Michelle Ustaszeski-Hutchinson was ready to start a job as a resident care assistant at a personalized senior care community in Richland, Pa., when the opportunity went up in smoke.

During her pre-employment screening, which included a drug test, she presented the employer with her state medical marijuana card and sent a copy of it to the company’s medical review officer, explaining that she uses marijuana to treat her post-traumatic stress and anxiety disorders. (Pennsylvania has a comprehensive medical marijuana program.)

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