In the case of mdcn, pretty directly. Mdcn is planning to stock swap and merge with zenabis, ihmml and canaleaf set for sept 30. Page 11 has the plan of operation. http://www.sec.gov/Archives/edgar/data/847015/000144586614001055/medican10q06302014.htm As for enrt, they are canadian but they trade in the us. I can't remember the canadian ticker but they are dual listed.
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