PT - JOURNAL ARTICLE ED - , AID - 10.1136/bjo.85.4.508 DP - 2001 Apr 01 TA - British Journal of Ophthalmology PG - 508--508 VI - 85 IP - 4 4099 - http://bjo.bmj.com/content/85/4/508.short 4100 - http://bjo.bmj.com/content/85/4/508.full SO - Br J Ophthalmol2001 Apr 01; 85