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Ho PL, Chau PH, Yip PS, Ooi GC, Khong PL, Ho JC, Wong PC, Ko C, Yan C, Tsang KW.Ho PL, et al. Among authors: chau ph.Eur Respir J. 2005 Sep;26(3):474-9. doi: 10.1183/09031936.05.1076704.Eur Respir J. 2005.PMID: 16135731Free article.