[1] Univ Calif Los Angeles UCLA, Div Infect Dis, Lundquist Inst Biomed Innovat Harbor, Torrance, CA 90502 USA
[2] Univ Texas Hlth Sci Ctr San Antonio, San Antonio, TX 78229 USA
[3] South Texas Vet Hlth Care Syst, San Antonio, TX 78229 USA
[4] UCLA, David Geffen Sch Med, Los Angeles, CA 90095 USA