Synthesis using prospective meta-analysis to reduce youths' e-cigarette use (SPARKE): a protocol for an individual participant data prospective meta-analysis (IPD PMA) examining interventions for the prevention of youth e-cigarette use. - McCrabb S; Hunter KE; Turon H; Barnes C; Williams JG; Aberoumand M; Banks E; Yoong S; Milat A; Hodder RK; Gardner LA; Newton N; et al. (BMJ open, 2025)