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Other recommended practices for in-flight use: Use discretely if approved Dispose properly in can lid compartment only Never leave used pouches in seat pockets Verify current airline policies before departure Pack only reasonable personal-use quantities (1-4 weeks' supply) Keep products in original packaging with clear labeling Carry receipts proving personal purchase Research backup nicotine alternatives available atthe destination

E-cigarettes, in contrast, offer a broader range, delivering anywhere from less than 1 mg to over 15 mg per vaping use, varying by device and e-liquid composition

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Details of the data linkage can be found in our previous study [9]