Lars Lien

January 5, 2026

Geographic variation in the utilisation of specialist healthcare for patients with substance use disorders in Norway: a population-based registry study

Abstract Purpose: The purpose of this study is to analyse geographic variation in rates of patients and service utilisation for…

December 16, 2024

Frequency and patterns of substance-induced psychosis in persons with concurrent mental health and substance use disorders during the COVID-19 pandemic: A Norwegian register-based cohort study

Abstract Background: Substance use may be associated with the onset of psychotic symptoms, necessitating treatment for individuals with comorbid mental…