Patient Demographics^a.

aTable 1 contains demographic information for all patients with sequenced samples. No additional treatment information was available for patient 8. Ages, viral loads and CD4 values were rounded to two significant digits to maintain patient privacy. 3TC–lamivudine, ABC–abacavir, AZT—d4T = stavudine, ddI–didanosine, EFV–efavirenz, FTC–emtricitabine, LPV/r–lopinavir/ritonavir, NFV–nelfinavir, NVP–nevirapine, TDF–tenofovir, ZDV–zidovudine, SMZ-TMP–sulfamethoxazole and trimethoprim, LGE–linear gingival erythema. Patient Demographicsa.