Eligibility criteria
Trials were considered eligible if they (1) enrolled HIV-seronegative
pregnant women; (2)compared DP with SP; (3)provided information on
maternal or neonatal outcomes, adverse effects; (4)were a randomized
clinical trial conducted;. Studies were excluded if they did not fit the
eligibility criteria. Besides, abstracts, reviews and commentaries were
excluded (unless they provided additional information from published
RCTs).