Primary research by Charles Obeng and colleagues. DOI: 10.1371/journal.pone.0354800.
Primary research by Farai Nyabadza. DOI: 10.1371/journal.pone.0356366.
Primary research by Chidiebele Petronilla Ojukwu and colleagues. DOI: 10.1371/journal.pone.0351523.
Primary research by Elizabeth Opiyo Onyango and colleagues. DOI: 10.1371/journal.pone.0359620.
Primary research by Richard Nyeko and colleagues. DOI: 10.1371/journal.pone.0334140.
Primary research by Jibril Abdikadir Ali and colleagues. DOI: 10.1371/journal.pone.0326958.
Primary research by Olugbenga Oluseun Oluwagbemi and colleagues. DOI: 10.1371/journal.pone.0332573.
Primary research by Anura David and colleagues. DOI: 10.1371/journal.pone.0325585.
Primary research by Ochuwa Adiketu Babah and colleagues. DOI: 10.1371/journal.pone.0334098.
Primary research by Alice Charwudzi and colleagues. DOI: 10.1371/journal.pone.0335544.