RT Journal Article SR Electronic T1 Addressing quality in surgical services in sub-Saharan Africa: hospital context and data standardisation matter JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP bmjqs-2021-013259 DO 10.1136/bmjqs-2021-013259 A1 Tihitena Negussie Mammo A1 Thomas G Weiser YR 2021 UL http://qualitysafety.bmj.com/content/early/2021/06/07/bmjqs-2021-013259.abstract AB