Prader-Willi and Angelman Syndromes
Medicine 77:140-151, Cassidy,S.B.&Schwartz,S., 1998
Physical Features of Prader-Willi Syndrome in Neonates
Am J Dis Child 144:1251-1254, Aughton,D.J.&Cassidy,S.B., 1990
The Cornelia de Lange Syndrome
J Pediatr 63:1000-1020, Ptacek,L.J., 1963