Okpako, Tosan, Woodward, Abi, Walters, Kate, Davies, Nathan, Stevenson, Fiona, Nimmons, Danielle, Chew-Graham, Carolyn A, Protheroe, Joanne, Armstrong, Megan, "Effectiveness of self-management interventions for long-term conditions in people experiencing socio-economic deprivation in high-income countries: a systematic review and meta-analysis", Journal of Public Health,