Effects of colectomy on gallbladder motility in patients with ulcerative colitis - Damiao, Aderson Omar Mourão Cintra; Sipahi, Aytan Miranda; Vezozzo, Denise P; Gonçalves, Patrícia L; Habr Gama, Angelita; Teixeira, Magaly Gemio; Fukushima, Júlia T; Laudanna, Antônio Atílio (Digestive Diseases and Sciences, 1997)