Cockayne Syndrome: Review of 140 Cases
Am J Med Genet 42:68-84, Nance,M.A. &Berry,S.A., 1992
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