Author contributions
T.M., T.M., M.H.
C.P.G. and A.S.H. contributed to the conception of the research. C.P.G., T.M., M.H.,
A.S.H., R.W., and B.H. contributed to funding acquisition. T.M., C.R., M.H., B.H., C.F.,
T.B.D., A.K., and S.T. were involved in NHS Digital data acquisition and management.
T.B.D., C.R., B.H., and T.M. were involved in ethics applications. P.N. produced the map
of participants by hospital. A.S. produced Figure 2. T.M. drafted the first version of
this manuscript, all co-authors made critical revisions and provided intellectual content
to the manuscript, approved the final version to be published, and agreed to be
accountable for all aspects of the work. C.P.G. and T.M. are the guarantors for this
study.