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Chen YJ, Wang PH, Yuan CC, Yen YK, Yang MJ, Ng HT, Chang SP, Liu WM.Chen YJ, et al. Among authors: chang sp.Hum Reprod. 2003 May;18(5):1077-81. doi: 10.1093/humrep/deg200.Hum Reprod. 2003.PMID: 12721187
Yang TS, Wang HL, Chen YJ, Chang SP, Yuan CC.Yang TS, et al. Among authors: chang sp.J Chin Med Assoc. 2004 Jul;67(7):336-43.J Chin Med Assoc. 2004.PMID: 15510930Clinical Trial.
Yang TS, Liang WH, Chang SP, Yuan CC.Yang TS, et al. Among authors: chang sp.Zhonghua Yi Xue Za Zhi (Taipei). 2002 Jan;65(1):23-8.Zhonghua Yi Xue Za Zhi (Taipei). 2002.PMID: 11939671Clinical Trial.