TY - STAND AU - I. Douglas AU - S. Evans AU - A. Hingorani AU - A. Grosso AU - A. Timmis AU - H. Hemingway AU - L. Smeeth BT - Bmj DO - 10.1136/bmj.e4388 PY - 2012 EP - e4388 T2 - Bmj TI - Clopidogrel and interaction with proton pump inhibitors: comparison between cohort and within person study designs VL - 345 SN - 0959-8138 ER -