00393nas a2200133   4500000000100000000000100001008004100002100001700043700002200060245012800082300001000210490000700220022003200227       2001                            d1 aL. Rodriguez1 aS. Hernandez-Diaz00aRelative risk of upper gastrointestinal complications among users of acetaminophen and nonsteroidal anti-inflammatory drugs  a570-60 v12  a1044-3983 (Print) 1044-3983