[1] Richard L Roudebush VA Med Ctr, Ctr Hlth Informat & Commun, Indianapolis, IN USA
[2] Indiana Univ Purdue Univ, Dept Psychol, Indianapolis, IN 46205 USA
[3] ACT Ctr Indiana, Indianapolis, IN USA
[4] Regenstrief Inst Hlth Care, Ctr Hlth Serv Res, Indianapolis, IN USA
[5] Ctr Chron Dis Outcomes Res, Minneapolis Vet Affairs Healthcare Syst, Minneapolis, MN USA
[6] Univ Minnesota, Dept Med, Box 736 UMHC, Minneapolis, MN 55455 USA
[7] Indiana Univ Purdue Univ, Commun Studies, Indianapolis, IN 46202 USA