Haider, N, Osman, A Y, Gadzekpo, A, Akipede, G O, Asogun, D, Ansumana, R, Lessells, R J, Khan, P, Hamid, M M A, Yeboah-Manu, D, Mboera, L, Shayo, E H, Mmbaga, B T, Urassa, M, Musoke, D, Kapata, N, Ferrand, R A, Kapata, P C, Stigler, F, Czypionka, T, Zumla, A, Kock, R, McCoy, D, "Lockdown measures in response to COVID-19 in nine sub-Saharan African countries", BMJ Global Health, 2020