any comments from experts, on its method?

来源: SU 于 2013-07-12 12:20:13 [] [旧帖] [给我悄悄话] 阅读数 : (160 bytes)

I wonder if it's common for men (especially senior men) to take fish oil supplements. Could this be a confounding factor, instead of a possible predictor/cause?

请您先登陆，再发跟帖！