[1] Oklahoma City VA Med Ctr, Hosp & Palliat Care Med, 921 NE 13th 11G, Oklahoma City, OK 73104 USA
[2] Univ Oklahoma, Hlth Sci Ctr, Reynolds Dept Geriatr Med, 1122 NE 13th ORB 1200, Oklahoma City, OK 73117 USA
[3] Oklahoma City VA Med Ctr, 921 NE 13th 11G, Oklahoma City, OK 73104 USA
[4] Denver Hlth, Davis Pavil,Pavil E,700 Delaware St, Denver, CO 80204 USA