1. Department of Family Medicine, Womack Army Medical Center , Fort Liberty, NC 28310, USA
2. Department of Family Medicine, Dwight D. Eisenhower Army Medical Center , Fort Gordon, GA 30905, USA
3. Department of Research and Medical Education, Campbell University, Jerry M. Wallace School of Osteopathic Medicine , Lillington, NC 27546, USA
4. Department of Family Medicine, Campbell University, Jerry M. Wallace School of Osteopathic Medicine , Lillington, NC 27546, USA
5. Department of Medicine, Womack Army Medical Center , Fort Liberty, NC 28310, USA