1. Department of Radiology, University of Washington, UWMC Roosevelt, P.O. Box 354755, 4245 Roosevelt Way Northeast, Seattle, WA 98105, USA
2. Department of Sociology, Central Washington University, Des Moines Teaching Center, Higher Education Center, Building 29, 2400 S 240th Street, P.O. Box 13490, Des Moines, WA 98198, USA