Availability of Illegal Drugs During the COVID-19 Pandemic in Western Germany oleh Norbert Scherbaum, Udo Bonnet, Udo Bonnet, Henning Hafermann, Fabrizio Schifano, Stefan Bender, Torsten Grigoleit, Jens Kuhn, Jens Kuhn, Peter Nyhuis, Ulrich W. Preuss, Gerhard Reymann, Udo Schneider, Jo Shibata, Michael Specka