Received: 22 July 2021
Accepted: 3 December 2021
First Online: 14 January 2022
: This study was approved by the Psychiatry, Midwifery and Nursing Research Ethics Committee of King’s College London (HR-16/17-3957) and from the Research Ethics Committee of the hospital where this research was conducted (CEI/C/015/2017). All participants in this study provided written consent.
: Not applicable.
: Even though this study was not funded by any external organisation, the Mexican Council of Science and Technology provided funding to ELC, who is the principal author of this review, to study her PhD at King’s College London. GT and CH are employed by King’s College London, and although GT and CH have received grants from different organisations, this review was not funded by any external grant. GT is supported by the National Institute for Health Research (NIHR) Applied Research Collaboration South London at King’s College London NHS Foundation Trust, and by the NIHR Asset Global Health Unit award. The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health and Social Care. GT is also supported by the Guy’s and St Thomas’ Charity for the On Trac project (EFT151101), and by the UK Medical Research Council (UKRI) in relation to the Emilia (MR/S001255/1) and Indigo Partnership (MR/R023697/1) awards. There are no other competing interests to declare.