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It was found that extensive use of the internet was not associated with higher success rates in smoking cessation 3,5 and several online programs showed limited results due to their inability to generate sufficient user engagement to ensure sustainable cessation 18-20

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Hubal EA, de Wet T, Du Toit L, Firestone MP, Ruchirawat M, van Engelen J, Vickers C

The specific principle is as follows: the molecular weight of the metabolite is determined based on the mass-to-charge ratio ( m / z ) of the parent ion in the MS1 spectrum, and the molecular formula is predicted using mass deviation (ppm) and adduct ion information before matching with the database