[1] VA Palo Alto Hlth Care Syst, Patient Care Serv, Populat Hlth Serv 10P4V, US Dept Vet Affairs, 3801 Miranda Ave,M-C 132, Palo Alto, CA 94304 USA
[2] San Francisco VA Med Ctr, HIV Hepatitis & Related Condit, Off Specialty Care Serv 10P11I, US Dept Vet Affairs, 4150 Clement St,116B, San Francisco, CA 94121 USA
[3] US Dept Vet Affairs, HIV Hepatitis & Related Condit, Off Specialty Care Serv 10P11I, 810 Vermont Ave, Washington, DC 20420 USA
[4] US Dept Vet Affairs, Off Secretary Hlth, 810 Vermont Ave, Washington, DC 20420 USA
[5] US Dept Vet Affairs, Vet Affairs, Off Secretary Hlth, 810 Vermont Ave, Washington, DC 20420 USA