RT Journal Article SR Electronic T1 A case of 48,XXXX female with normal intelligence. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 230 OP 232 DO 10.1136/jmg.9.2.230 VO 9 IS 2 A1 R D Blackston A1 A T Chen YR 1972 UL http://jmg.bmj.com/content/9/2/230.abstract AB