TY - JOUR AN - 87 AU - Zhao,J. AU - Sastry,S.M. AU - Sperduto,R.D. TI - Arteriovenous crossing patterns in branch retinal vein occlusion. JO - Ophthalmology PY - 1993 VL - 100 SP - 423-428 M2 - 423 DO - 10.1016/S0161-6420(93)31633-7 ER -