Park, Sophie, Owen-Boukra, Emily, Burford, Bryan, Cohen, Tanya, Duddy, Claire, Dunn, Harry, Fadia, Vacha, Goodman, Claire, Henry, Cecily, Lamb, Elizabeth I, Ogden, Margaret, Rapley, Tim, Rees, Eliot, Vance, Gillian, Wong, Geoff, "General practitioner workforce sustainability to maximise effective and equitable patient care: a realist review protocol", BMJ Open, 2024