Marihuana, LSD, heroin. Ex-junkie Marc Lewis devoured it all, preferably in high doses. He stole medicine from medical practices, was arrested on several occasions, and received a suspended prison sentence. Later on, Lewis - by now a professor of Neurosciences - wrote a book about his former life as an addict. He will give a lecture, organised by Studium Generale and the students of the Public Health Organisation, on 8 November.