[1] Baylor Coll Med, Michael E DeBakey VA Med Ctr, Houston Ctr Qual Care & Utilizat Studies, Houston, TX 77030 USA
[2] Yale Univ, Sch Med, Robert Wood Johnson Clin Scholars Program, New Haven, CT USA
[3] Yale Univ, Sch Nursing, Ctr Excellence Chron Illness Care, New Haven, CT 06536 USA
[4] Yale Univ, Sch Med, Dept Epidemiol & Publ Hlth, New Haven, CT 06510 USA
[5] Yale Univ, Sch Med, Dept Internal Med, New Haven, CT 06510 USA