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[120] [121] Including Atlanta, [136] Boston, [137] Chicago, [138] Colorado Springs, [139] Columbia, [140] Columbus, [141] Detroit, [142] Durham, [143] Eugene, [144] Grand Rapids, [145] Miami, [146] New York, [147] Oakland, [148] Portland, [149] Philadelphia, [150] Phoenix, [151] Pittsburgh, [152] Richmond, [153] Seattle, [154] San Antonio, [155] San Diego, [156] San Francisco, [157] and Washington, D.C

State health officials have tied the cases to vitamin E acetate, a substance found in black-market cannabis vapes but not nicotine e-cigarettes

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By combining these two principles, one can generally calculate (i) the dose at which a cMRTP aerosol has the same effect than cigarette smoke, (ii) their relative effects as a percentage, and (iii) the residual effect over cessation