Received: 22 May 2020
Accepted: 5 November 2020
First Online: 16 November 2020
Ethical approval and consent to participate.
: This review was based on previous published articles indicating that there is no need of ethical clearance. However, the protocol of this study was pre-registered on PROSPERO (International prospective register of systematic reviews) University of York, Centre for Reviews and Dissemination with registration number CRD42019123549.
: Not applicable.
: There is no any competing interest.