http://www.gastro.org/clinicalRes/brochures/gallstones.html information from the American Gastroenterological Association

http://win.niddk.nih.gov/publications/gallstones.htm information from the National Institute of Diabetes Digestive and Kidney Diseases

http://www.laparoscopy.net/chole/chole1.htm information from the Online Laparoscopic Technical Manual

http://www.laparoscopy.com/fr_welcome.html information from laparoscopy.com

http://www.henryfordhealth.org/13073.cfm information from Henry Ford Health System

http://www.ddc.musc.edu/ddc_pub/digestiveProbs/diseases/pancBiliary/sphincterOddi.htm information from Medical University South Carolina

http://www.top5plus5.com/Pancreas/Sphincter%20of%20Oddi%20dysfunction/Sphincter%20of%20Oddi%20Dysfunction.htm information from Pancreatitis Association International