1. Department of Internal Medicine, Weiss Memorial Hospital, Chicago, Illinois, USA
2. Department of Internal Medicine, Texas Tech University Health Science Center, Lubbock, Texas, USA
3. Department of Internal Medicine, Einstein Medical Center, Philadelphia, Pennsylvania, USA
4. Immunology Unit, Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
5. Department of Internal Medicine, Jefferson Einstein Hospital, Philadelphia, Pennsylvania, USA
6. Department of Internal Medicine, Ascension Saint Francis Hospital, Evanston, Illinois, USA
7. Cardiovascular Medicine, Virginia Commonwealth University, Richmond, Virginia, USA