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Baseline measurements Participants were booked for a baseline visit with the study investigators (a licensed nurse, AJ, or a medical doctor, PaG) for oral and written study information, acquirement of consent, and snus cessation support (Appendix 1)
At the mouthpiece end, create a slight taper by using less material
A hemp wick or a lighter works well
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Finally, the accuracy of the suction capacity was tested, and the suction volume parameters were calibrated by the displacement of the soap film in the soap film flowmeter
