BIOPATH is a cohort of approximately 3,200 Syrian refugee children aged 8-16 years at recruitment. The children and their families were recruited from informal tented settlements in the Beqaa region. Notably, as some caregivers did not know or have a record of the child’s exact date of birth, in some cases there was some uncertainty about the child’s age. At 1-year follow-up, the study selected some families for data collection, and others were invited to a linked clinical trial.