Co-development and testing of an extended community pharmacy model of service delivery for managing osteoarthritis: protocol for a sequential, multi-methods study (PharmOA) oleh Opeyemi O. Babatunde, Elizabeth Cottrell, Simon White, Adrian Chudyk, Emma L. Healey, John Edwards, Elaine Nicholls, Nicola O’Brien, Adam Todd, Christine Walker, Colin Stanford, Tania Cork, Angela Long, Joanna Simkins, Christian D. Mallen, Krysia Dziedzic, Melanie A. Holden