TY - STAND AU - L. Rodriguez AU - S. Hernandez-Diaz BT - Epidemiology M1 - 5 PY - 2001 SP - 570 EP - 6 T2 - Epidemiology TI - Relative risk of upper gastrointestinal complications among users of acetaminophen and nonsteroidal anti-inflammatory drugs VL - 12 SN - 1044-3983 (Print) 1044-3983 ER -