Caffeine, alcohol, khat, and tobacco use during pregnancy in Butajira, South Central Ethiopia Alamneh, Alehegn Aderaw ; Endris, Bilal Shikur ; Gebreyesus, Seifu Hagos Abstract Publication: PLoS ONE Pub Date: May 2020 DOI: 10.1371/journal.pone.0232712 Bibcode: 2020PLoSO..1532712A