RT Journal Article SR Electronic T1 First trimester diagnosis from chorionic villi of a der(15),t(9;15)(q33;q14)mat identified by DA/DAPI staining. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 89 OP 90 DO 10.1136/jmg.23.1.89 VO 23 IS 1 A1 J O Van Hemel A1 D F Majoor-Krakauer A1 M G Jahoda A1 E S Sachs YR 1986 UL http://jmg.bmj.com/content/23/1/89.abstract AB