TY - RPRT TI - Interinstrument variability in Hertel-type exophthalmometers. AU - Tamsin J Sleep AU - Ruth M Manners PY - 2002 DO - 10.1097/00002341-200207000-00004 UR - https://pubmed.ncbi.nlm.nih.gov/12142756/ ID - 12142756 ER -