[1] Univ Utah, Internal Med Residency Program, Salt Lake City, UT USA
[2] Univ Utah, Sch Med, Dept Internal Med, Div Resp Crit Care & Occupat Pulm Med, Salt Lake City, UT USA
[3] Univ Utah, Dept Internal Med, Div Gen Internal Med, Sch Med, Salt Lake City, UT USA
[4] Salt Lake City Vet Affairs Med Ctr, Dept Internal Med, Div Gen Internal Med, Salt Lake City, UT USA
[5] UPMC Altoona, Altoona, PA USA