[1] US Dept Vet Affairs, Qual Enhancement Res Initiat QUERI, Vet Heath Adm, Washington, DC 20420 USA
[2] Univ Michigan, Dept Psychiat, Med Sch, Ann Arbor, MI 48109 USA
[3] Hines VA Med Ctr, VA Informat Resource Ctr VIREC, Hines, IL 60141 USA
[4] Univ Illinois, Sch Publ Hlth, Chicago, IL 60607 USA
[5] Providence VA Med Ctr, Providence, RI 02908 USA
[6] Vet Hlth Adm, Providence, RI 02908 USA
[7] Brown Sch Med, Providence, RI 02912 USA
[8] US Dept Vet Affairs, Hlth Serv Res & Dev, Vet Hlth Adm, Washington, DC 20420 USA