RT Journal Article SR Electronic T1 Absence of learning difficulties in a hyperactive boy with a terminal Xp deletion encompassing the MRX49locus JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 466 OP 470 DO 10.1136/jmg.38.7.466 VO 38 IS 7 A1 Tobias, E S A1 Bryce, G A1 Farmer, G A1 Barton, J A1 Colgan, J A1 Morrison, N A1 Cooke, A A1 Tolmie, J L YR 2001 UL http://jmg.bmj.com/content/38/7/466.abstract AB