[1] Univ Washington, Dept Family Med, Seattle, WA 98195 USA
[2] Med Coll Wisconsin Cent Wisconsin, Wausau, WI USA
[3] Michigan State Univ, Coll Human Med, Dept Family Med, E Lansing, MI 48824 USA
[4] Michigan State Univ, Dept Family Med, E Lansing, MI 48824 USA
[5] Michigan State Univ, Inst Hlth Policy, E Lansing, MI 48824 USA
[6] Le Moyne Coll, Noreen Reale Falcone Lib, Syracuse, NY USA
[7] SUNY Upstate Med Univ, Dept Publ Hlth & Prevent Med, Syracuse, NY 13210 USA
[8] SUNY Upstate Med Univ, Dept Family Med, Syracuse, NY 13210 USA