The visible animal project: a three-dimensional, digital database for high quality three-dimensional reconstructions. - Böttcher P; Maierl J; Schiemann T; Glaser C; Weller R; Hoehne KH; Reiser M; Liebich HG (Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, 1999)