A PHASE II, STRATIFIED, RANDOMIZED, DOUBLE-BLIND, MULTI-CENTER STUDY OF THE SAFETY AND EFFICACY OF ADEFOVIR DIPIVOXIL (ADF) AT TWO DOSE LEVELS IN TRIPLE COMBINATION THERAPIES WITH PROTEASE INHIBITORS (PI) AND NUCLEOSIDE REVERSE TRANSCRIPTASE INHIBITORS (RTI) FOR THE TREATMENT OF HIV-INFECTED PATIENT: