RT Journal Article SR Electronic T1 Tetrasomy 21pter→q21.2 in a male infant without typical Down’s syndrome dysmorphic features but moderate mental retardation JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP e26 OP e26 DO 10.1136/jmg.2003.011833 VO 41 IS 3 A1 I Rost A1 H Fiegler A1 C Fauth A1 P Carr A1 T Bettecken A1 J Kraus A1 C Meyer A1 A Enders A1 A Wirtz A1 T Meitinger A1 N P Carter A1 M R Speicher YR 2004 UL http://jmg.bmj.com/content/41/3/e26.abstract AB