[1] Michigan State Univ, Coll Human Med, Dept Med, E Lansing, MI 48824 USA
[2] Natl Board Med Examiners, Philadelphia, PA 19104 USA
[3] Univ Massachusetts, Sch Med, Worcester, MA USA
[4] Meyers Primary Care Inst, Worcester, MA USA
[5] Natl Board Med Examiners, Clin Skills Evaluat Collaborat, Philadelphia, PA 19104 USA
[6] Natl Board Med Examiners, Assessment Programs, Philadelphia, PA 19104 USA