RT Journal Article SR Electronic T1 Spontaneous abortion and NSAIDs JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 2145 OP 2145 DO 10.1503/cmaj.111-2092 VO 183 IS 18 A1 Christine A. Clark A1 Karen A. Spitzer A1 Carl A. Laskin A1 Gideon Koren YR 2011 UL http://www.cmaj.ca/content/183/18/2145.1.abstract