A study published yesterday in the New England Journal of Medicine by a team of researchers at the Mayo Clinic provides further evidence that contaminated THC oils are likely playing a major role in the vaping-associated respiratory disease outbreak and makes it even less likely that store-bought nicotine e-liquids are playing any role at all. Here is the key evidence provided by the paper: 1. The overwhelming majority of patients admitted to vaping THC oils. Approximately 76% of the patients studied who reported on product…