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... 7. Page 11. or, equivalently, the Lehmann alternatives. S = S k. 1. 2. This latter alternative is often called the proportional hazards alternative, and the ...
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Sometimes sexually transmitted infections are spread in ways other than sexual contact. For example, STIs can spread to infants during pregnancy or childbirth.
唯有准确诊断,方可有效治疗。我们的专家诊断并治疗最具有挑战性的医学难题。 全美排名,名列前茅. 根据《美国新闻与世界报道》,妙 ...
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