Dema, E., Gibbs, J., Clifton, S., Copas, A., Tanton, C., Riddell, J., Bosó Pérez, R., Reid, D., Bonell, C., Unemo, M., Mercer, C., Mitchell, K., Sonnenberg, P. & Field, N. 2022, 'Initial impacts of the COVID-19 pandemic on sexual and reproductive health service use and unmet need in Britain: findings from a quasi-representative survey (Natsal-COVID)', Lancet Public Health, 7(1), pp. e36-e47. http://dx.doi.org/10.1016/S2468-2667(21)00253-X