TY - JOUR A1 - Pierce, M. A1 - Hope, H. A1 - Ford, T. T1 - Mental health before and during the COVID-19 pandemic: A longitudinal probability sample survey of the UK population Y1 - 2020 DO - 10.1016/S2215-0366(20)30308-4 VL - 7 IS - 10 ER -