[1] Univ Calif San Diego, Dept Med, Rebecca & John Moores UCSD Canc Ctr, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Dept Med, Div Infect Dis, La Jolla, CA 92093 USA
[3] VA San Diego Healthcare, Res Serv, San Diego, CA USA
[4] Univ Calif San Diego, Dept Med, Div Rheumatol Allergy & Immunol, La Jolla, CA 92093 USA