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Published in: BMC Pulmonary Medicine 1/2014

Open Access 01-12-2014 | Research article

Serum heat shock protein 47 levels are elevated in acute interstitial pneumonia

Authors: Tomoyuki Kakugawa, Shin-ichi Yokota, Yuji Ishimatsu, Tomayoshi Hayashi, Shota Nakashima, Shintaro Hara, Noriho Sakamoto, Hiroshi Kubota, Mariko Mine, Yasuhiro Matsuoka, Hiroshi Mukae, Kazuhiro Nagata, Shigeru Kohno

Published in: BMC Pulmonary Medicine | Issue 1/2014

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Abstract

Background

Heat shock protein (HSP) 47, a collagen-specific molecular chaperone, is involved in the processing and/or secretion of procollagen. We hypothesized that HSP47 could be a useful marker for fibrotic lung disease. The aim of this study was to evaluate serum levels of HSP47 in patients with various idiopathic interstitial pneumonias (IIPs).

Methods

Subjects comprised 9 patients with acute interstitial pneumonia (AIP), 12 with cryptogenic organizing pneumonia (COP), 16 with nonspecific interstitial pneumonia (NSIP), 19 with idiopathic pulmonary fibrosis (IPF), and 19 healthy adult volunteers.

Results

Patients with AIP had serum HSP47 levels that were significantly higher than those of COP, NSIP or IPF patients and those of healthy volunteers. In contrast, serum levels of HSP47 among patients with COP, NSIP, IPF, and healthy volunteers did not differ significantly. Receiver operating characteristic curves revealed that the cut-off level for HSP47 that resulted in the highest diagnostic accuracy for discriminating between AIP and COP, NSIP, IPF, and healthy controls was 859.3 pg/mL. The sensitivity, specificity, and diagnostic accuracy were 100.0%, 98.5%, and 98.7%, respectively.

Conclusion

The present results demonstrate that, among patients with various IIPs, serum levels of HSP47 were elevated specifically in patients with AIP.
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Literature
2.
go back to reference Raghu G, Collard HR, Egan JJ, Martinez FJ, Behr J, Brown KK, Colby TV, Cordier JF, Flaherty KR, Lasky JA, Lynch DA, Ryu JH, Swigris JJ, Wells AU, Ancochea J, Bouros D, Carvalho C, Costabel U, Ebina M, Hansell DM, Johkoh T, Kim DS, King TE, Kondoh Y, Myers J, Muller NL, Nicholson AG, Richeldi L, Selman M, Dudden RF: An official ATS/ERS/JRS/ALAT statement: idiopathic pulmonary fibrosis: evidence-based guidelines for diagnosis and management. Am J Respir Crit Care Med. 2011, 183 (6): 788-824. 10.1164/rccm.2009-040GL.CrossRefPubMed Raghu G, Collard HR, Egan JJ, Martinez FJ, Behr J, Brown KK, Colby TV, Cordier JF, Flaherty KR, Lasky JA, Lynch DA, Ryu JH, Swigris JJ, Wells AU, Ancochea J, Bouros D, Carvalho C, Costabel U, Ebina M, Hansell DM, Johkoh T, Kim DS, King TE, Kondoh Y, Myers J, Muller NL, Nicholson AG, Richeldi L, Selman M, Dudden RF: An official ATS/ERS/JRS/ALAT statement: idiopathic pulmonary fibrosis: evidence-based guidelines for diagnosis and management. Am J Respir Crit Care Med. 2011, 183 (6): 788-824. 10.1164/rccm.2009-040GL.CrossRefPubMed
3.
go back to reference Hunninghake GW, Zimmerman MB, Schwartz DA, King TE, Lynch J, Hegele R, Waldron J, Colby T, Muller N, Lynch D, Galvin J, Gross B, Hogg J, Toews G, Helmers R, Cooper JA, Baughman R, Strange C, Millard M: Utility of a lung biopsy for the diagnosis of idiopathic pulmonary fibrosis. Am J Respir Crit Care Med. 2001, 164 (2): 193-196. 10.1164/ajrccm.164.2.2101090.CrossRefPubMed Hunninghake GW, Zimmerman MB, Schwartz DA, King TE, Lynch J, Hegele R, Waldron J, Colby T, Muller N, Lynch D, Galvin J, Gross B, Hogg J, Toews G, Helmers R, Cooper JA, Baughman R, Strange C, Millard M: Utility of a lung biopsy for the diagnosis of idiopathic pulmonary fibrosis. Am J Respir Crit Care Med. 2001, 164 (2): 193-196. 10.1164/ajrccm.164.2.2101090.CrossRefPubMed
4.
go back to reference Stahel RA, Gilks WR, Lehmann HP, Schenker T: Third international workshop on lung tumor and differentiation antigens: overview of the results of the central data analysis. Int J Cancer Suppl. 1994, 8: 6-26.CrossRefPubMed Stahel RA, Gilks WR, Lehmann HP, Schenker T: Third international workshop on lung tumor and differentiation antigens: overview of the results of the central data analysis. Int J Cancer Suppl. 1994, 8: 6-26.CrossRefPubMed
5.
go back to reference Kohno N, Kyoizumi S, Awaya Y, Fukuhara H, Yamakido M, Akiyama M: New serum indicator of interstitial pneumonitis activity: sialylated carbohydrate antigen KL-6. Chest. 1989, 96 (1): 68-73. 10.1378/chest.96.1.68.CrossRefPubMed Kohno N, Kyoizumi S, Awaya Y, Fukuhara H, Yamakido M, Akiyama M: New serum indicator of interstitial pneumonitis activity: sialylated carbohydrate antigen KL-6. Chest. 1989, 96 (1): 68-73. 10.1378/chest.96.1.68.CrossRefPubMed
6.
go back to reference Yokoyama A, Kondo K, Nakajima M, Matsushima T, Takahashi T, Nishimura M, Bando M, Sugiyama Y, Totani Y, Ishizaki T, Ichiyasu H, Suga M, Hamada H, Kohno N: Prognostic value of circulating KL-6 in idiopathic pulmonary fibrosis. Respirology. 2006, 11 (2): 164-168. 10.1111/j.1440-1843.2006.00834.x.CrossRefPubMed Yokoyama A, Kondo K, Nakajima M, Matsushima T, Takahashi T, Nishimura M, Bando M, Sugiyama Y, Totani Y, Ishizaki T, Ichiyasu H, Suga M, Hamada H, Kohno N: Prognostic value of circulating KL-6 in idiopathic pulmonary fibrosis. Respirology. 2006, 11 (2): 164-168. 10.1111/j.1440-1843.2006.00834.x.CrossRefPubMed
7.
go back to reference Greene KE, King TE, Kuroki Y, Bucher-Bartelson B, Hunninghake GW, Newman LS, Nagae H, Mason RJ: Serum surfactant proteins-A and -D as biomarkers in idiopathic pulmonary fibrosis. Eur Respir J. 2002, 19 (3): 439-446. 10.1183/09031936.02.00081102.CrossRefPubMed Greene KE, King TE, Kuroki Y, Bucher-Bartelson B, Hunninghake GW, Newman LS, Nagae H, Mason RJ: Serum surfactant proteins-A and -D as biomarkers in idiopathic pulmonary fibrosis. Eur Respir J. 2002, 19 (3): 439-446. 10.1183/09031936.02.00081102.CrossRefPubMed
8.
go back to reference Takahashi H, Fujishima T, Koba H, Murakami S, Kurokawa K, Shibuya Y, Shiratori M, Kuroki Y, Abe S: Serum surfactant proteins A and D as prognostic factors in idiopathic pulmonary fibrosis and their relationship to disease extent. Am J Respir Crit Care Med. 2000, 162 (3 Pt 1): 1109-1114.CrossRefPubMed Takahashi H, Fujishima T, Koba H, Murakami S, Kurokawa K, Shibuya Y, Shiratori M, Kuroki Y, Abe S: Serum surfactant proteins A and D as prognostic factors in idiopathic pulmonary fibrosis and their relationship to disease extent. Am J Respir Crit Care Med. 2000, 162 (3 Pt 1): 1109-1114.CrossRefPubMed
9.
go back to reference Kobayashi J, Kitamura S: KL-6: a serum marker for interstitial pneumonia. Chest. 1995, 108 (2): 311-315. 10.1378/chest.108.2.311.CrossRefPubMed Kobayashi J, Kitamura S: KL-6: a serum marker for interstitial pneumonia. Chest. 1995, 108 (2): 311-315. 10.1378/chest.108.2.311.CrossRefPubMed
10.
go back to reference Ohnishi H, Yokoyama A, Kondo K, Hamada H, Abe M, Nishimura K, Hiwada K, Kohno N: Comparative study of KL-6, surfactant protein-A, surfactant protein-D, and monocyte chemoattractant protein-1 as serum markers for interstitial lung diseases. Am J Respir Crit Care Med. 2002, 165 (3): 378-381. 10.1164/ajrccm.165.3.2107134.CrossRefPubMed Ohnishi H, Yokoyama A, Kondo K, Hamada H, Abe M, Nishimura K, Hiwada K, Kohno N: Comparative study of KL-6, surfactant protein-A, surfactant protein-D, and monocyte chemoattractant protein-1 as serum markers for interstitial lung diseases. Am J Respir Crit Care Med. 2002, 165 (3): 378-381. 10.1164/ajrccm.165.3.2107134.CrossRefPubMed
11.
go back to reference Nakajima H, Harigai M, Hara M, Hakoda M, Tokuda H, Sakai F, Kamatani N, Kashiwazaki S: KL-6 as a novel serum marker for interstitial pneumonia associated with collagen diseases. J Rheumatol. 2000, 27 (5): 1164-1170.PubMed Nakajima H, Harigai M, Hara M, Hakoda M, Tokuda H, Sakai F, Kamatani N, Kashiwazaki S: KL-6 as a novel serum marker for interstitial pneumonia associated with collagen diseases. J Rheumatol. 2000, 27 (5): 1164-1170.PubMed
12.
go back to reference Kinder BW, Brown KK, McCormack FX, Ix JH, Kervitsky A, Schwarz MI, King TE: Serum surfactant protein-A is a strong predictor of early mortality in idiopathic pulmonary fibrosis. Chest. 2009, 135 (6): 1557-1563. 10.1378/chest.08-2209.CrossRefPubMedPubMedCentral Kinder BW, Brown KK, McCormack FX, Ix JH, Kervitsky A, Schwarz MI, King TE: Serum surfactant protein-A is a strong predictor of early mortality in idiopathic pulmonary fibrosis. Chest. 2009, 135 (6): 1557-1563. 10.1378/chest.08-2209.CrossRefPubMedPubMedCentral
13.
go back to reference Al-Salmi QA, Walter JN, Colasurdo GN, Sockrider MM, Smith EO, Takahashi H, Fan LL: Serum KL-6 and surfactant proteins A and D in pediatric interstitial lung disease. Chest. 2005, 127 (1): 403-407. 10.1378/chest.127.1.403.CrossRefPubMed Al-Salmi QA, Walter JN, Colasurdo GN, Sockrider MM, Smith EO, Takahashi H, Fan LL: Serum KL-6 and surfactant proteins A and D in pediatric interstitial lung disease. Chest. 2005, 127 (1): 403-407. 10.1378/chest.127.1.403.CrossRefPubMed
14.
go back to reference Nagata K, Saga S, Yamada KM: A major collagen-binding protein of chick embryo fibroblasts is a novel heat shock protein. J Cell Biol. 1986, 103 (1): 223-229. 10.1083/jcb.103.1.223.CrossRefPubMed Nagata K, Saga S, Yamada KM: A major collagen-binding protein of chick embryo fibroblasts is a novel heat shock protein. J Cell Biol. 1986, 103 (1): 223-229. 10.1083/jcb.103.1.223.CrossRefPubMed
15.
go back to reference Nagai N, Hosokawa M, Itohara S, Adachi E, Matsushita T, Hosokawa N, Nagata K: Embryonic lethality of molecular chaperone hsp47 knockout mice is associated with defects in collagen biosynthesis. J Cell Biol. 2000, 150 (6): 1499-1506. 10.1083/jcb.150.6.1499.CrossRefPubMedPubMedCentral Nagai N, Hosokawa M, Itohara S, Adachi E, Matsushita T, Hosokawa N, Nagata K: Embryonic lethality of molecular chaperone hsp47 knockout mice is associated with defects in collagen biosynthesis. J Cell Biol. 2000, 150 (6): 1499-1506. 10.1083/jcb.150.6.1499.CrossRefPubMedPubMedCentral
16.
go back to reference Sauk JJ, Smith T, Norris K, Ferreira L: Hsp47 and the translation-translocation machinery cooperate in the production of alpha 1(I) chains of type I procollagen. J Biol Chem. 1994, 269 (6): 3941-3946.PubMed Sauk JJ, Smith T, Norris K, Ferreira L: Hsp47 and the translation-translocation machinery cooperate in the production of alpha 1(I) chains of type I procollagen. J Biol Chem. 1994, 269 (6): 3941-3946.PubMed
17.
go back to reference Taguchi T, Razzaque MS: The collagen-specific molecular chaperone HSP47: is there a role in fibrosis?. Trends Mol Med. 2007, 13 (2): 45-53. 10.1016/j.molmed.2006.12.001.CrossRefPubMed Taguchi T, Razzaque MS: The collagen-specific molecular chaperone HSP47: is there a role in fibrosis?. Trends Mol Med. 2007, 13 (2): 45-53. 10.1016/j.molmed.2006.12.001.CrossRefPubMed
18.
go back to reference Razzaque MS, Hossain MA, Kohno S, Taguchi T: Bleomycin-induced pulmonary fibrosis in rat is associated with increased expression of collagen-binding heat shock protein (HSP) 47. Virchows Arch. 1998, 432 (5): 455-460. 10.1007/s004280050191.CrossRefPubMed Razzaque MS, Hossain MA, Kohno S, Taguchi T: Bleomycin-induced pulmonary fibrosis in rat is associated with increased expression of collagen-binding heat shock protein (HSP) 47. Virchows Arch. 1998, 432 (5): 455-460. 10.1007/s004280050191.CrossRefPubMed
19.
go back to reference Ishii H, Mukae H, Kakugawa T, Iwashita T, Kaida H, Fujii T, Hayashi T, Kadota J, Kohno S: Increased expression of collagen-binding heat shock protein 47 in murine bleomycin-induced pneumopathy. Am J Physiol Lung Cell Mol Physiol. 2003, 285 (4): L957-L963.CrossRefPubMed Ishii H, Mukae H, Kakugawa T, Iwashita T, Kaida H, Fujii T, Hayashi T, Kadota J, Kohno S: Increased expression of collagen-binding heat shock protein 47 in murine bleomycin-induced pneumopathy. Am J Physiol Lung Cell Mol Physiol. 2003, 285 (4): L957-L963.CrossRefPubMed
20.
go back to reference Kakugawa T, Mukae H, Hishikawa Y, Ishii H, Sakamoto N, Ishimatsu Y, Fujii T, Koji T, Kohno S: Localization of HSP47 mRNA in murine bleomycin-induced pulmonary fibrosis. Virchows Arch. 2010, 456 (3): 309-315. 10.1007/s00428-009-0876-x.CrossRefPubMed Kakugawa T, Mukae H, Hishikawa Y, Ishii H, Sakamoto N, Ishimatsu Y, Fujii T, Koji T, Kohno S: Localization of HSP47 mRNA in murine bleomycin-induced pulmonary fibrosis. Virchows Arch. 2010, 456 (3): 309-315. 10.1007/s00428-009-0876-x.CrossRefPubMed
21.
go back to reference Razzaque MS, Nazneen A, Taguchi T: Immunolocalization of collagen and collagen-binding heat shock protein 47 in fibrotic lung diseases. Mod Pathol. 1998, 11 (12): 1183-1188.PubMed Razzaque MS, Nazneen A, Taguchi T: Immunolocalization of collagen and collagen-binding heat shock protein 47 in fibrotic lung diseases. Mod Pathol. 1998, 11 (12): 1183-1188.PubMed
22.
go back to reference Kakugawa T, Mukae H, Hayashi T, Ishii H, Nakayama S, Sakamoto N, Yoshioka S, Sugiyama K, Mine M, Mizuta Y, Kohno S: Expression of HSP47 in usual interstitial pneumonia and nonspecific interstitial pneumonia. Respir Res. 2005, 6: 57-10.1186/1465-9921-6-57.CrossRefPubMedPubMedCentral Kakugawa T, Mukae H, Hayashi T, Ishii H, Nakayama S, Sakamoto N, Yoshioka S, Sugiyama K, Mine M, Mizuta Y, Kohno S: Expression of HSP47 in usual interstitial pneumonia and nonspecific interstitial pneumonia. Respir Res. 2005, 6: 57-10.1186/1465-9921-6-57.CrossRefPubMedPubMedCentral
23.
go back to reference Kakugawa T, Yokota S, Ishimatsu Y, Hayashi T, Nakashima S, Hara S, Sakamoto N, Kubota H, Mine M, Matsuoka Y, Mukae H, Nagata K, Kohno S: Serum heat shock protein 47 levels are elevated in acute exacerbation of idiopathic pulmonary fibrosis. Cell Stress Chaperones. 2013, 18 (5): 581-590. 10.1007/s12192-013-0411-5.CrossRefPubMedPubMedCentral Kakugawa T, Yokota S, Ishimatsu Y, Hayashi T, Nakashima S, Hara S, Sakamoto N, Kubota H, Mine M, Matsuoka Y, Mukae H, Nagata K, Kohno S: Serum heat shock protein 47 levels are elevated in acute exacerbation of idiopathic pulmonary fibrosis. Cell Stress Chaperones. 2013, 18 (5): 581-590. 10.1007/s12192-013-0411-5.CrossRefPubMedPubMedCentral
24.
go back to reference Razzaque MS, Foster CS, Ahmed AR: Role of collagen-binding heat shock protein 47 and transforming growth factor-beta1 in conjunctival scarring in ocular cicatricial pemphigoid. Invest Ophthalmol Vis Sci. 2003, 44 (4): 1616-1621. 10.1167/iovs.02-0644.CrossRefPubMed Razzaque MS, Foster CS, Ahmed AR: Role of collagen-binding heat shock protein 47 and transforming growth factor-beta1 in conjunctival scarring in ocular cicatricial pemphigoid. Invest Ophthalmol Vis Sci. 2003, 44 (4): 1616-1621. 10.1167/iovs.02-0644.CrossRefPubMed
25.
go back to reference Razzaque MS, Kumatori A, Harada T, Taguchi T: Coexpression of collagens and collagen-binding heat shock protein 47 in human diabetic nephropathy and IgA nephropathy. Nephron. 1998, 80 (4): 434-443. 10.1159/000045217.CrossRefPubMed Razzaque MS, Kumatori A, Harada T, Taguchi T: Coexpression of collagens and collagen-binding heat shock protein 47 in human diabetic nephropathy and IgA nephropathy. Nephron. 1998, 80 (4): 434-443. 10.1159/000045217.CrossRefPubMed
26.
go back to reference Brown KE, Broadhurst KA, Mathahs MM, Brunt EM, Schmidt WN: Expression of HSP47, a collagen-specific chaperone, in normal and diseased human liver. Lab Invest. 2005, 85 (6): 789-797. 10.1038/labinvest.3700271.CrossRefPubMed Brown KE, Broadhurst KA, Mathahs MM, Brunt EM, Schmidt WN: Expression of HSP47, a collagen-specific chaperone, in normal and diseased human liver. Lab Invest. 2005, 85 (6): 789-797. 10.1038/labinvest.3700271.CrossRefPubMed
27.
go back to reference Amenomori M, Mukae H, Sakamoto N, Kakugawa T, Hayashi T, Hara A, Hara S, Fujita H, Ishimoto H, Ishimatsu Y, Nagayasu T, Kohno S: HSP47 in lung fibroblasts is a predictor of survival in fibrotic nonspecific interstitial pneumonia. Respir Med. 2010, 104 (6): 895-901. 10.1016/j.rmed.2010.01.011.CrossRefPubMed Amenomori M, Mukae H, Sakamoto N, Kakugawa T, Hayashi T, Hara A, Hara S, Fujita H, Ishimoto H, Ishimatsu Y, Nagayasu T, Kohno S: HSP47 in lung fibroblasts is a predictor of survival in fibrotic nonspecific interstitial pneumonia. Respir Med. 2010, 104 (6): 895-901. 10.1016/j.rmed.2010.01.011.CrossRefPubMed
28.
go back to reference Yokota S, Kubota H, Matsuoka Y, Naitoh M, Hirata D, Minota S, Takahashi H, Fujii N, Nagata K: Prevalence of HSP47 antigen and autoantibodies to HSP47 in the sera of patients with mixed connective tissue disease. Biochem Biophys Res Commun. 2003, 303 (2): 413-418. 10.1016/S0006-291X(03)00352-8.CrossRefPubMed Yokota S, Kubota H, Matsuoka Y, Naitoh M, Hirata D, Minota S, Takahashi H, Fujii N, Nagata K: Prevalence of HSP47 antigen and autoantibodies to HSP47 in the sera of patients with mixed connective tissue disease. Biochem Biophys Res Commun. 2003, 303 (2): 413-418. 10.1016/S0006-291X(03)00352-8.CrossRefPubMed
29.
go back to reference Collard HR, Calfee CS, Wolters PJ, Song JW, Hong SB, Brady S, Ishizaka A, Jones KD, King TE, Matthay MA, Kim DS: Plasma biomarker profiles in acute exacerbation of idiopathic pulmonary fibrosis. Am J Physiol Lung Cell Mol Physiol. 2010, 299 (1): L3-L7. 10.1152/ajplung.90637.2008.CrossRefPubMedPubMedCentral Collard HR, Calfee CS, Wolters PJ, Song JW, Hong SB, Brady S, Ishizaka A, Jones KD, King TE, Matthay MA, Kim DS: Plasma biomarker profiles in acute exacerbation of idiopathic pulmonary fibrosis. Am J Physiol Lung Cell Mol Physiol. 2010, 299 (1): L3-L7. 10.1152/ajplung.90637.2008.CrossRefPubMedPubMedCentral
30.
go back to reference Iwashita T, Kadota J, Naito S, Kaida H, Ishimatsu Y, Miyazaki M, Ozono Y, Kohno S: Involvement of collagen-binding heat shock protein 47 and procollagen type I synthesis in idiopathic pulmonary fibrosis: contribution of type II pneumocytes to fibrosis. Hum Pathol. 2000, 31 (12): 1498-1505. 10.1053/hupa.2000.20378.CrossRefPubMed Iwashita T, Kadota J, Naito S, Kaida H, Ishimatsu Y, Miyazaki M, Ozono Y, Kohno S: Involvement of collagen-binding heat shock protein 47 and procollagen type I synthesis in idiopathic pulmonary fibrosis: contribution of type II pneumocytes to fibrosis. Hum Pathol. 2000, 31 (12): 1498-1505. 10.1053/hupa.2000.20378.CrossRefPubMed
31.
go back to reference Kakugawa T, Mukae H, Hayashi T, Ishii H, Abe K, Fujii T, Oku H, Miyazaki M, Kadota J, Kohno S: Pirfenidone attenuates expression of HSP47 in murine bleomycin-induced pulmonary fibrosis. Eur Respir J. 2004, 24 (1): 57-65. 10.1183/09031936.04.00120803.CrossRefPubMed Kakugawa T, Mukae H, Hayashi T, Ishii H, Abe K, Fujii T, Oku H, Miyazaki M, Kadota J, Kohno S: Pirfenidone attenuates expression of HSP47 in murine bleomycin-induced pulmonary fibrosis. Eur Respir J. 2004, 24 (1): 57-65. 10.1183/09031936.04.00120803.CrossRefPubMed
32.
go back to reference Ware LB, Matthay MA: The acute respiratory distress syndrome. N Engl J Med. 2000, 342 (18): 1334-1349. 10.1056/NEJM200005043421806.CrossRefPubMed Ware LB, Matthay MA: The acute respiratory distress syndrome. N Engl J Med. 2000, 342 (18): 1334-1349. 10.1056/NEJM200005043421806.CrossRefPubMed
Metadata
Title
Serum heat shock protein 47 levels are elevated in acute interstitial pneumonia
Authors
Tomoyuki Kakugawa
Shin-ichi Yokota
Yuji Ishimatsu
Tomayoshi Hayashi
Shota Nakashima
Shintaro Hara
Noriho Sakamoto
Hiroshi Kubota
Mariko Mine
Yasuhiro Matsuoka
Hiroshi Mukae
Kazuhiro Nagata
Shigeru Kohno
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Pulmonary Medicine / Issue 1/2014
Electronic ISSN: 1471-2466
DOI
https://doi.org/10.1186/1471-2466-14-48

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