<qa>  What is the average CBT session?Patients in primary care settings with multiple unexplained symptoms are treated with 10 weekly sessions of CBT or treatment as usual. Physical symptoms, comorbid psychiatric symptoms, disability, and health care utilization are measured and assessed through a combination of structured interviews and self-reports. Assessments are performed at study start, mid-treatment, end of treatment, and at a 6-month follow-up. 