RT Journal Article SR Electronic T1 COX-2 inhibitors and type 4 error JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 190 OP 190 VO 169 IS 3 A1 Pijak, Michal R. A1 Gazdik, Frantisek YR 2003 UL http://www.cmaj.ca/content/169/3/190.abstract