Digital interventions in severe mental health problems: lessons from the Actissist development and trial

Department of Psychiatry and Psychotherapy, Medical Faculty, Heinrich-Heine University, D€usseldorf, Germany; WHO Collaborating Centre on Quality Assurance and Empowerment in Mental Health, D€usseldorf, Germany; Department of Psychiatry, Medical Faculty, University of Cologne, Cologne, Germany; German Center for Neurodegenerative Diseases, Bonn, Germany; Department of Neuropsychiatry, Kyushu University, Fukuoka, Japan; Japanese Society of Psychiatry and Neurology, Tokyo, Japan Unless specifically stated, the views expressed in this letter are those of the authors and do not represent the official policies or positions of the WHO.