[1] Penn State Coll Med, Dept Family & Community Med, Hershey, PA 17033 USA
[2] Penn State Coll Med, Dept Publ Hlth Sci, Hershey, PA 17033 USA
[3] Penn State Hlth, St Josephs Family & Community Med Residency Progr, Hershey, PA USA
[4] Penn State Coll Med, Harrell Lib, Hershey, PA USA
[5] Univ Colorado, Sch Med, Dept Family Med, Anschutz Med Campus, Aurora, CO USA
[6] Penn State Coll Med, Dept Humanities, Hershey, PA USA
[7] Rodale Inst, Kutztown, PA USA
[8] Providence VA Med Ctr, Dept Family Med, Providence, RI USA
[9] Providence VA Med Ctr, Dept Hlth Serv Policy & Practice, Providence, RI USA
[10] Brown Univ, Providence, RI 02912 USA
[11] Wageningen Univ, Div Human Nutr & Hlth, Wageningen, Netherlands