Changes in daily mental health service use and mortality at the commencement and lifting of COVID-19 ‘lockdown’ policy in 10 UK sites: a regression discontinuity in time design oleh Neil Nixon, Matthew Broadbent, David Osborn, Rob Waller, Shanquan Chen, Andrew McIntosh, Dan W Joyce, Jonathan Lewis, Caroline A Jackson, Jane Beenstock, Paul Bibby, Rudolf Cardinal, Karthik Chinnasamy, Simon Douglas, Philip Horner, Sze Chim Lee