Kawamoto, T., Shoda, J., Asano, T., Ueda, T., Furukawa, M., Koike, N., Tanaka, N., Todoroki, T., and Miwa, M. Expression of cyclooxygenase-2 in the subserosal layer correlates with postsurgical prognosis of pathological tumor stage 2 carcinoma of the gallbladder.