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Zhang J, Lam SP, Li SX, Tang NL, Yu MWM, Li AM, Wing YK.Zhang J, et al. Among authors: li sx, li am.Pain. 2012 Mar;153(3):666-673. doi: 10.1016/j.pain.2011.12.003. Epub 2012 Jan 23.Pain. 2012.PMID: 22277557
Wing YK, Hui SH, Pak WM, Ho CK, Cheung A, Li AM, Fok TF.Wing YK, et al. Among authors: li am.Arch Dis Child. 2003 Dec;88(12):1043-7. doi: 10.1136/adc.88.12.1043.Arch Dis Child. 2003.PMID: 14670764Free PMC article.Clinical Trial.