Evidence Acquisition: A systematic review of the English-language literature was undertaken using MEDLINE and EMBASE (searched through February 2007) and the search term aspirin or acetylsalicylic acid and dose.

• 取证：应用MEDLINE及EMBASE（搜索截止2007年2月），系统回顾了英文文献，搜索词为“阿司匹林”或“阿司匹林，剂量”。