Fig. 1From: The CIPRUS study, a nurse-led psychological treatment for patients with undifferentiated somatoform disorder in primary care: study protocol for a randomised controlled trial GP general practitioner, ICPC International Classification of Primary Care, PHQ-15 the Patient Health Questionnaire somatization scale, SCID-I Structured Clinical Interview for DSM-IV Axis I disorders, USD undifferentiated somatoform disorder, MHNP mental health nurse practitionerBack to article page