Received: 27 February 2021
Accepted: 16 April 2021
First Online: 4 May 2021
: The study was approved by the Regional Committee for Medical and Health Research Ethics South East (reg. no. 2012/1458a), and by the Data Protection Officers in each of the 17 health trusts with participating crisis resolution teams. All patients in the multicentre study signed a written informed consent to participate in the study. The study followed the principles in the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.