[1] Univ Iowa, Roy J & Lucille A Carver Coll Med, Iowa City, IA USA
[2] Univ Iowa, Coll Nursing, Iowa City, IA USA
[3] Univ Iowa, Roy J & Lucille A Carver Coll Med, Dept Internal Med, Iowa City, IA USA
[4] Penn State Univ, Ross & Carol Nese Coll Nursing, University Pk, PA USA
[5] Univ Iowa, Coll Publ Hlth, Dept Epidemiol, Dept Emergency Med, Iowa City, IA USA
[6] Univ Iowa, Roy J & Lucille A Carver Coll Med, Dept Internal Med, 200 Hawkins DR, Iowa City, IA 52242 USA