1. Department of Medicine, University of California , San Francisco , USA
2. Department of Epidemiology and Biostatistics, University of California , San Francisco , USA
3. Department of Pathology and Laboratory Medicine, Brown University , Providence, Rhode Island , USA
4. Department of Medicine, Stroger Hospital, Cook County Health , Chicago, Illinois , USA
5. Department of Medicine, Albert Einstein College of Medicine , New York , USA
6. Department of Obstetrics and Gynecology, State University of New York Downstate Health Sciences University , Brooklyn , USA
7. Department of Medicine, Georgetown University Medical Center , Washington, District of Columbia , USA
8. Medical Service, Department of Veterans Affairs Medical Center , San Francisco, California , USA