Nauck, FriedemannFriedemannNauckOstgathe, C.C.OstgatheKlaschik, E.E.Klaschik2022-12-202022-12-202001https://resolver.sub.uni-goettingen.de/purl?gro-2/118908enOpioid Switching from High Dose Morphine to Methadoneconference_abstract