Protocol for a cluster-randomised controlled trial evaluating the impact of a preschool-based capacity building intervention on intimate partner violence and substance misuse in Sr... oleh Kamalini Lokuge, Polly Wallace, Kalini Subasinghe, Katherine Thurber, Tissa De Silva, Naomi Clarke, Dulshika Waas, Nisansala Liyanage, Udena Attygalle, Bradley Carron-Arthur, Kalyana Rodrigo, Emily Banks, Cate D’Este, Thilini Rajapakse