To achieve between a @ % and @ % probability of no gag response , propofol TCIs were between @ and @ gmL ( that could be achieved with a bolus of @ mgkg ) when remifentanil TCI was fixed at @ ngmL , and target propofol TCIs were between @ and @ gmL ( that could be achieved with a bolus of @ mgkg ) when remifentanil TCI was fixed at @ ngmL .