Department of Cardiology;
State Key Laboratory of Cardiovascular Disease;
Fuwai Hospital;
National Center for Cardiovascular Diseases;
Chinese Academy of Medical Sciences and Peking Union Medical College;
Beijing;
China;
Medical Research and Biometrics Center;
State Key Laboratory of Cardiovascular Disease;
Fuwai Hospital;
National Center for Cardiovascular Diseases;
Chinese Academy of Medical Sciences and Peking Union Medical College;
Beijing;
China;
Xinxiang Central Hospital;
Xinxiang;
Henan Province;
China;
Langfang People’s Hospital;
Langfang;
Hebei Province;
China;
First Hospital of Qinhuangdao;
Qinhuangdao;
Hebei Province;
China;
Acute myocardial infarction; Clopidogrel; Drug interaction; Propensity score matching; Proton-pump inhibitors;