RT Journal Article SR Electronic T1 Etiology and Pathogenesis of Down Syndrome JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 351 OP 351 DO 10.1136/jmg.34.4.351-a VO 34 IS 4 A1 Antonarakis, Stylianos E YR 1997 UL http://jmg.bmj.com/content/34/4/351.2.abstract AB