[1] Michael E DeBakey VA Med Ctr, Houston VA Ctr Innovat Qual Effectiveness & Safet, Houston, TX 77030 USA
[2] Michael E DeBakey VA Med Ctr, Houston, TX 77030 USA
[3] Baylor Coll Med, Michael E DeBakey Dept Surg, Houston, TX 77030 USA
[4] Nebraska Western Iowa VA Med Ctr, Omaha, NE USA
[5] Univ Nebraska Med Ctr, Dept Surg, Omaha, NE USA
[6] Miami VA Healthcare Syst, Miami, FL USA
[7] Sinai Hosp, Sinai Ctr Geriatr Surg, Dept Surg, Baltimore, MD 21215 USA
[8] VA Connecticut Healthcare Syst, Dept Anesthesiol, New Haven, CT USA
[9] Yale Univ, Sch Med, New Haven, CT USA
[10] VA Connecticut Healthcare Syst, Surg Serv, New Haven, CT USA
[11] Yale Univ, Sch Med, Dept Surg, New Haven, CT 06510 USA