[1] Michigan State Univ, Coll Human Med, Off Med Educ Res & Dev, E Lansing, MI 48824 USA
[2] Michigan State Univ, Coll Human Med, Dept Epidemiol & Biostat, E Lansing, MI 48824 USA
[3] Michigan State Univ, Coll Human Med, Dept Physiol, E Lansing, MI 48824 USA