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Tsang KW, Ho PL, Lam WK, Ip MS, Chan KN, Ho CS, Ooi CC, Yuen KY.Tsang KW, et al. Among authors: ho cs, ho pl.Am J Respir Crit Care Med. 1998 Sep;158(3):723-7. doi: 10.1164/ajrccm.158.3.9710090.Am J Respir Crit Care Med. 1998.PMID: 9730996Clinical Trial.
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