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Clemens PL, Cloyd JC, Kriel RL, Remmel RP.Clemens PL, et al. Among authors: cloyd jc.Clin Drug Investig. 2007;27(4):243-50. doi: 10.2165/00044011-200727040-00003.Clin Drug Investig. 2007.PMID: 17358096Clinical Trial.