A top U.S. toxicologist is questioning Canada’s response to a tainted-cannabis problem in the medical-marijuana sector, saying patients aren’t being given accurate information on the risks associated with a banned pesticide thousands of people may have consumed. Warren Porter, a specialist in molecular and environmental toxicology at the University of Wisconsin-Madison, says company phone calls and e-mails, approved by Health Canada, to patients after a series of recent product recalls are misleading, and appear to be based on faulty science.
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