Media type: E-Article Title: Too much or too little opioids to patients receiving opioid agonist therapy in Norway (2013–2017): a prospective cohort study Contributor: Vold, Jørn Henrik; Skurtveit, Svetlana; Aas, Christer; Johansson, Kjell Arne; Fadnes, Lars Thore imprint: Springer Science and Business Media LLC, 2020 Published in: BMC Health Services Research Language: English DOI: 10.1186/s12913-020-05504-y ISSN: 1472-6963 Keywords: Health Policy Origination: Footnote: Access State: Open Access