Validation of the Inflammatory Bowel Disease Questionnaire IBDQ-D, German Version, for Patients with Ileal Pouch Anal Anastomosis for Ulcerative Colitis - Häuser, W; Dietz, N; Grandt, D; Steder-Neukamm, U; Janke, K -H; Stein, U; Stallmach, A (Zeitschrift für Gastroenterologie, 2004)