A Clinical Study of Noonan Syndrome
Arch Dis Child 67:178-183, Sharland, M.,et al, 1992
Prader-Willi-Syndrome, In Endocrine & Genetic Diseases of Childhood & Adolescence
(Ed) , 1975. W. B. Saunders Co, p, Gardner,L.I., 1975
Prader-Willi and Angelman Syndromes
Medicine 77:140-151, Cassidy,S.B.&Schwartz,S., 1998