1. Womack Army Medical Center, Department of Family Medicine , Fort Bragg, NC 28310, USA
2. Department of Research and Medical Education, Campbell University, Jerry M. Wallace School of Osteopathic Medicine , Lillington, NC 27546, USA
3. Department of Primary Care, Weed Army Community Hospital , Fort Irwin, CA 92310, USA
4. Department of Family Medicine, Campbell University, Jerry M. Wallace School of Osteopathic Medicine , Lillington, NC 27546, USA