RT Journal Article SR Electronic T1 Postmarket surveillance of high-risk medical devices needs transparent, comprehensive and independent registries JF BMJ Surgery, Interventions, & Health Technologies FD BMJ Publishing Group Ltd SP e000065 DO 10.1136/bmjsit-2020-000065 VO 2 IS 1 A1 Alan G Fraser YR 2020 UL http://sit.bmj.com/content/2/1/e000065.abstract