retrospective nested case-control study 回顾性巢式病例对照研究
Methods Retrospective case-control study.
方法采用回顾性对照研究。
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First, it is a retrospective case-control study and is therefore susceptible to reporting bias, meaning that people with ALS may report their coffee consumption differently from controls.
FORBES: Does Coffee Drinking Really Protect Against Devastating Diseases?
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