A Retrospective and prospective, obsErvational (non-interventional), post-authorization Safety cohort sTudy to evaluate the incidence of the breAkages and insertion/Removal complications of buprenorphine implants in rouTine clinical care (RE-START)First published 19/04/2024 Last updated 26/02/2025 EU PAS number: EUPAS1000000092StudyOngoing