van Gils, Anne Personalized, Web-Based, Guided Self-Help for Patients With Medically Unexplained Symptoms in Primary Care: Protocol for a Randomized Controlled Trial. [electronic resource] - JMIR research protocols 10 2019 - e13738 p. digital Publication Type: Journal Article ISSN: 1929-0748 Standard No.: 10.2196/13738 doi