PT - JOURNAL ARTICLE AU - K. R. Wilhelmus TI - Correction AID - 10.1136/bjo.65.7.511 DP - 1981 Jul 01 TA - British Journal of Ophthalmology PG - 511--511 VI - 65 IP - 7 4099 - http://bjo.bmj.com/content/65/7/511.1.short 4100 - http://bjo.bmj.com/content/65/7/511.1.full SO - Br J Ophthalmol1981 Jul 01; 65