j*******7 发帖数: 31 | | P****D 发帖数: 11146 | | S******t 发帖数: 1437 | | p********a 发帖数: 5352 | 4 汗,在HEALTHCARE混了这么多年,还第一次听说这个 | s**********n 发帖数: 23 | 5 if it's talking about study design, it basically includes: cohort study,
case-control study, and cross-sectional study.
【在 j*******7 的大作中提到】 : 谢谢!
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