Funding for this research was provided by:
Nottinghamshire Leukaemia Appeal
Saudi Arabia Ministry of Education
Received: 12 March 2020
Accepted: 26 June 2020
First Online: 7 July 2020
Ethics approval and consent to participate
: The East Midlands - Nottingham 1 Research Ethics Committee approved the study protocol (reference 06/Q2403/16). Written informed consent was obtained from the participants for sample collection and analysis in accordance to the Declaration of Helsinki guidelines.
: Not applicable.
: The authors declare that they have no competing interests.