Stanford University School of Medicine, Stanford, CA

C.L.B. reports support through the National Center for Advancing Translational Sciences (KL2TR003143) and the National Institute of Allergy and Infectious Diseases (L30AI178800). M.P.L. reports support through the National Heart, Lung, and Blood Institute (K23HL143042).

C.L.B. has received an honorarium from Gilead Sciences for serving on an advisory board; Gilead Sciences was in no way involved in any aspect of this study.

Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (www.jaids.com).

C.L.B. conceived and designed the study, acquired the data; C.L.B. and D.B. performed the analysis and created the figures. All authors provided technical expertise and contributed to data interpretation and drafting of the article. All authors contributed substantially to article revision and approved the final version. C.L.B. had full access to the data in the study and takes responsibility for the paper as a whole.