Andoh, L.A.Abaidoo, Robert C.Obiri-Danso, K.Drechsel, PayKonradsen, FlemmingKlank, L.T.2012-05-212012-05-21https://hdl.handle.net/10568/17044Helminth contamination of lettuce and associated risk factors at production sites, markets and street food vendor points in urban and peri-urban Kumasi, Ghana