Received: 5 February 2020
Accepted: 5 April 2020
First Online: 14 May 2020
Ethics approval and consent to participate
: This systematic review received ethical approval from the School of Psychology Ethics Committee University of Leeds, UK (Ref. №: 16–0373). Consent to participate is not applicable.
: Not applicable.
: EQ authored two of the cross-sectional studies included in this review. We declare no other competing interests.