Quigley Harry A, Friedman David S, Congdon Nathan G
Glaucoma Service and the Dana Center for Preventive Ophthamology, Wilmer Ophthamological Institute, John Hopkins University School of Medicine, Baltimore, Maryland 21287, USA.
J Glaucoma. 2003 Apr;12(2):167-80. doi: 10.1097/00061198-200304000-00013.