Clinical information of study subjects at time of sampling.

IS indicates subjects from the induced sputum cohort, IU-BAL indicates subjects from the Indiana University cohort, and UW-BAL indicates subjects from the University of Washington cohort.1In cases where exact time was not known, patient was asked to provide an estimate.2R = ritonavir, N = nevirapine, S = saquinavir, Z = zidovudine, L = lamivudine, E = efavirenz, T = tenofovir.3Viral load dipped to 400 copies during brief period of HAART 5 months before BAL.4Patient had history of HAART reducing VL to undetectable levels in 1997, 2000, and 2001.