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Retention in care to 5 years on treatment by (a) treatment initiation period, (b) subdistrict, (c) age at treatment initiation and (d) baseline regimen (P = log-rank test). A3E, Abacavir, lamivudine and efavirenz; A3L, abacavir, lamivudine and lopinavir; ART, antiretroviral therapy; LTFU, losses to follow-up; S3E, stavudine, lamivudine and efavirenz; S3L, stavudine, lamivudine and lopinavir.
