Lessons from conducting trans-national Internet-mediated participatory research with hidden populations of cannabis cultivators

Monica J. Barratt, Gary R. Potter, Marije Wouters, Chris Wilkins, Bernd Werse, Jussi Perälä, Michael Mulbjerg Pedersen, Holly Nguyen, Aili Malm, Simon Lenton, Dirk Korf, Axel Klein, Julie Heyde, Pekka Hakkarainen, Vibeke Asmussen Frank, Tom Decorte, Martin Bouchard, Thomas Blok