RT Journal Article SR Electronic T1 STATISTICAL METHODS FOR EXAMINING RETINOPATHY IN RELATION TO THE CONTROL OF DIABETES AND OTHER FACTORS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 590 OP 595 DO 10.1136/bjo.47.10.590 VO 47 IS 10 A1 Carpenter, R. G. A1 Taylor, K. W. YR 1963 UL http://bjo.bmj.com/content/47/10/590.abstract AB