Funding for this research was provided by:
Wellcome Trust (206194)
Winston Churchill Foundation of the United States
Universiti Malaysia Sarawak (FA052000-0706-0002)
Text and Data Mining valid from 2020-01-17
Received: 9 July 2019
Accepted: 8 January 2020
First Online: 17 January 2020
Ethics approval and consent to participate
: Ethical approval was granted by the Ethical Review board of the National Institute for Medical Research in Tanzania, the Regional Ethical Review Board in Stockholm, Sweden (Dnr. 00-084, 2012/1151-32, 2006/893-31/4, 2018/2354-32), the Medical Research and Ethics Committee of the Ministry of Health, Malaysia and the Medical Ethics Committee, and Faculty of Medicine and Health Sciences, Universiti Malaysia Sarawak.
: Not applicable.
: The authors declare that they have no competing interests.