1. Department of Medicine, Section of General Internal Medicine , Baylor College of Medicine , Houston , TX , USA
2. Center for Medical Ethics and Health Policy , Baylor College of Medicine , Houston , TX , USA
3. Department of Internal Medicine , McGovern Medical School at UTHealth , Houston , TX , USA
4. Medical Care Line , Michael E. DeBakey Veterans Affairs Medical Center , Houston , TX , USA
5. Department of Medicine, Section of Infectious Disease , Baylor College of Medicine , Houston , TX , USA