Wilhelmsen, I Increased relapse of duodenal ulcers in patients treated with cognitive psychotherapy. [electronic resource] - Lancet (London, England) Aug 1990 - 307 p. digital Publication Type: Clinical Trial; Letter; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0140-6736 Standard No.: 10.1016/0140-6736(90)91836-y doi Subjects--Topical Terms: Cognitive Behavioral TherapyCombined Modality TherapyDuodenal Ulcer--therapyHumansRandomized Controlled Trials as TopicRecurrenceTime Factors