Von Hippel-Lindau Disease Affecting 43 Members of a Single Kindred
Medicine 68:1-29, Lamiell,J.M.,et al, 1989
Neurofibromatosis Type I in Children
J Pediatr 116:845-853, Listernick,R.&Charrow,J., 1990
Evaluation of Exophthalmos
NEJM 292:1005-1013, Grove,A.S., 1975