[1] Univ Iowa, Coll Publ Hlth, Dept Hlth Management & Policy, N222 CPHB,145 N Riverside Dr, Iowa City, IA 52242 USA
[2] Univ Iowa, Coll Publ Hlth, Dept Epidemiol, Iowa City, IA 52242 USA
[3] Univ Iowa, Coll Med, Dept Emergency Med, Iowa City, IA 52242 USA
[4] Univ Iowa, Coll Med, Div Crit Care, Dept Anesthesia, Iowa City, IA 52242 USA
[5] Avera McKennan, Sioux Falls, SD USA
[6] Avera eCARE, Sioux Falls, SD USA