4 Jomo Kenyatta University of Agriculture and Technology, Juja, Kenya.
5 DSI/NRF Centre of Excellence in Human Development, University of the Witwatersrand, Johannesburg, South Africa.
6 University of Health and Allied Sciences, Ho, Ghana.
7 University of Zambia, Lusaka, Zambia.
8 Tamale Technical University, Tamale, Ghana.
9 Kamuzu University of Health Sciences, Blantyre, Malawi.
10 University of KwaZulu-Natal, Durban, South Africa.
11 Developmental Pathways for Health Research Unit, University of the Witwatersrand, Johannesburg, South Africa.
12 Kampala International University, Kampala, Uganda.
13 Covenant University, Ota, Nigeria.
14 School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
15 North West University, Potchefstroom, South Africa.
16 University of South Africa, Pretoria, Africa.
17 Department of Surgery, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
18 University of Cape Coast, Cape Coast, Ghana.
19 African Population and Health Research Center, Nairobi, Kenya.
20 Kamuzu University of Health Sciences, Blantyre, Malawi; Stellenbosch Institute for Advanced Study, 7600 Stellenbosch, South Africa. Electronic address: ajmacnab@gmail.com.