Thyroid Function, Thyroid Immunoglobulin Status, and Urinary Iodine Excretion after Enteral Contrast-Agent Administration by Endoscopic Retrograde Cholangiopancreatography - Fassbender, W. J.; Vogel, C.; Doppl, W.; Stracke, H.; Bretzel, R. G.; Klör, H. U. (Endoscopy, 2001)