1. Johns Hopkins Bloomberg School of Public Health; Department of Epidemiology; 615 North Wolfe Street, Mail Room E6132 Baltimore Maryland USA 21205
2. The University of Alabama at Birmingham; Office of the Vice President for Research and Economic Development, Office of Industry Engagement, Clinical Trials Office; 1720 2nd Avenue South AB 714A Birmingham Alabama USA 35294-0107
3. Johns Hopkins University; Center for Clinical Trials and US Cochrane Center; Bloomberg School of Public Health 615 North Wolfe Street, Mail Rm E6152 Baltimore MD USA 21205