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Some add menthol for a cooling effect

At 95% level of confidence, the expanded uncertainty for NNK, NNN and NNAL is 0.667, 0.631 and 0.639 \(\upmu\)g/kg, respectively

This significantly reduces manual entry errors and speeds up the preparation process, especially for forms that require detailed business and personal background information

Prutzman YM, Wiseman KP, Grady MA, et al

demonstrating that a certain type of e-cig is effective for quitting does not mean by extension that they are all effective, even more so for e-cigs with nicotine salts for which there is not even a trial available that evaluated their effectiveness to quit