Dr. med. Tomislav Majić: Licensed psychiatrist and psychotherapist in Berlin, Germany, with a focus on psychosis, substance use, double diagnosis and harm reduction. Studied medicine at Charité University Clinic Berlin until 2005. Co-founder and lead of „Psychedelic Substances Research Group" at Charité. Lecturer and supervisor for psychodynamic therapy at Berlin Institute for Psychotherapy and Psychoanalysis (BIPP). Founder of day clinic for patients with double diagnoses (2017) and outpatient treatment for patients suffering from psychedelic-related disorders (2017) ("Ambulanz Psychedelische Substanzen") at Psychiatric University Clinic of Charité at Hospital St. Hedwig Berlin. Study therapist and researcher investigating therapeutic effects of classic psychedelics as well as psychedelic-related complications