RT Journal Article SR Electronic T1 Handbook of Ophthalmology by Thomas W. Gardner and David E. Shoch JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 569 OP 569 VO 55 IS 6 A1 Zakov, Z. Nicholas YR 1988 UL http://www.ccjm.org/content/55/6/569.1.abstract AB