- Motility of the sphincter of Oddi and pancreatic main ductal pressure in patients with alcoholic, gallstone-associated, and idiopathic chronic pancreatitis. Okazaki, K., Yamamoto, Y., Nishimori, I., Nishioka, T., Kagiyama, S., Tamura, S., Sakamoto, Y., Nakazawa, Y., Morita, M., Yamamoto, Y. Am. J. Gastroenterol. (1988)