TY - JOUR AU - Rivers, BJ; Walter, PA; Johnston, GR; Merkel, LK; Hardy, RM TI - Acalculous cholecystitis in four canine cases: ultrasonographic findings and use of ultrasonographic-guided, percutaneous cholecystocentesis in diagnosis JO - J Am Anim Hosp Assoc IS - 03 VL - 33 PY - 1997 DO - 10.5326/15473317-33-3-207 L3 - PubMed-ID: 9138230 SP - 207 EP - 214. ER -