Social network characteristics associated with mid-to-older aged adults’ co-engagement in physical activity - Martin Anderson; Srebrenka Letina; Mark McCann; Jelena Milicev; Grace Dibben; Abi MacDonald; Kirstin Mitchell; Laurence Moore; Jonathan R. Olsen; Victoria J. Palmer; Benjamin P. Rigby; Sharon A. Simpson; et al. (PLoS ONE, 2025)