A protocol for mobilising novel finance models for collaborative health promotion and disease prevention initiatives: taking a smart capacitating investment approach in the Invest4Health project - Lane, Joanna; Edwards, Rhiannon T.; Babarczy, Balázs; Whiteley, Holly; Oruganti, Vidya; Rutten-van Mölken, Maureen; Costongs, Caroline; Jani, Anant R.; Wordsworth, Sarah; Maassen, Alison; Tsiachristas, Apostolos; Davies, Jacob; et al. (Frontiers in Public Health, 2025)