Traditional randomized controlled trials (RCTs) can be thought of as 'additive' trials where randomization leads to the addition of treatments beyond placebo. Participants are confronted with the probability of receiving placebo (no treatment). This leads many potential participants to not consent or to withdraw if they believe they are receiving no treatment. In contrast, the proposed trial will be 'subtractive'. This innovative approach to randomization will involve suppression of just 1 of the 5 treatment components. Thus, all participants will receive at least 80% of the menu of interventions offered in this trial.
