Psychoses and illicit drug useneed for cross-cultural studiesRingen, Petter AndreasAuthor informationUllevål University Hospital Section for Psychosis Resarch TOP Building (B49) N-0407 Oslo Norway E-mail: [email protected]Acta Psychiatrica Scandinavica 118(1):p 86-87, July 2008.Copyright © 2008 Blackwell Publishing Ltd.