Multivitamins plus selenium in a single supplement , vs placebo , also reduced the risk of secondary events of combined outcomes for disease progression ( CD@ cell count @/L , AIDS-defining conditions , or AIDS-related death , whichever occurred earlier -LSB- adjusted HR , @ ; @ % CI , @-@ @ ; P = @ ; AER , @ / @ person-years ; censoring rate , @ ; @ events -RSB- ) .