Dr. Matthew McKenna, director of the CDC's Office on Smoking and Health..S. smoking was plummeting
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一项新研究显示,尽管接受剖腹产手术的女性产生并发症的危险稍高,但剖腹产可以帮助多数原有肛裂的女性预防肛门失禁。俄亥俄州莱特州立大学的麦克纳(David S. McKenna)博士与同事利用模型
exposure to it, but ",," Dr. Matt McKenna, director of the CDC's Office on Smoking and Health, said
Moreover,., University College Cork (UCC) in Ireland, and colleagues,.McKenna told the press