An intention to treat analysis will be performed, including all clusters as they were initially assigned, including premature withdrawals. Additionally, a per-protocol analysis will be carried out, where only clusters that have completed the study protocol will be considered. The primary outcome will be compared in each arm using chi-square if the variable of distribution is normal, or alternatively through the Fisher's exact test. Secondary outcomes will be compared using the Student's t-test or the Kruskal-Wallis test, the chi-square test or Fisher's exact test.