1. School of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106-4961, USA
2. Department of Health Policy and Administration, College of Health and Human Development, The Pennsylvania State University, University Park, PA 16801, USA
3. Department of Psychology, College of the Liberal Arts, The Pennsylvania State University, University Park, PA 16801, USA
4. The Psychiatric Outpatient Clinic, The Worker Hospital of the Capital Steel Incorporation, Beijing, P.R. China
5. The Outpatient Clinic, Mental Health Institute of Beijing Medical University, Beijing, P.R. China