From the *Glaucoma Service, Pacific Presbyterian Medical Center, San Francisco, and the Department of Ophthalmology, University of California, San Francisco; and the †Kaiser Permanente Medical Center, Redwood City, and the Department of Ophthalmology, Stanford University Medical Center, Stanford, CA. Address correspondence to Dr Lieberman, Department of Ophthalmology, Pacific Presbyterian Medical Center, 2340 Clay St, Fifth floor, San Francisco, CA 94115.
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Lieberman et al. (1990) studied this question.
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