Helicobacter pylori infection among patients presenting with dyspepsia at a primary care setting in Cameroon: seroprevalence, five-year trend and predictors - Aminde, J A; Dedino, G A; Ngwasiri, C A; Ombaku, K S; Mahop Makon, C A; Aminde, L N (BMC Infect Dis, 2019)