http://jurban.oxfordjournals.org/cgi/content/abstract/82/2/276
Ms. Collins et al.
Journal of urban health: bulletin of the New York Academy of Medicine. Vol. 82 (2): 276-284.
"Although medically supervised smoking facilities (SSFs) remain untested in North America, local health officials in Vancouver are considering to prepare a submission to Health Canada for an exemption to open Canada�s first SSF for evaluation."(Links to full abstract)