1 Department of Health Promotion, Education, and Behavior, University of South Carolina, 915 Greene Street, Discovery 1 Building, Suite #409, Columbia, SC 29208, USA. Electronic address: xiaoming@mailbox.sc.edu.
2 Department of Psychology, University of South Carolina, 1512 Pendleton Street, Barnwell College, Suite #220, Columbia, SC 29208, USA. Electronic address: harri764@mailbox.sc.edu.