RT Journal Article SR Electronic T1 Chromosome abnormalities: a major cause of birth defects, stillbirth and spontaneous abortion JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 849 OP 849 VO 117 IS 8 A1 Worton, R. G. YR 1977 UL http://www.cmaj.ca/content/117/8/849.abstract