Methods A retrospective cohort study was used in this study.
方法采用历史前瞻性流行病学方法。
Herpes zoster as a risk factor for stroke and TIA: a retrospective cohort study in the UK.
【译】带状疱疹是卒中和TIA的危险因素：一个在英国的回顾性队列研究。
Methods A cross sectional and a retrospective cohort study and animal experiment were carried out.
方法采用横断面调查、回顾队列调查和动物实验等方法。
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