Adaptation, Psychological 1 Adolescent 1 Adult 1 Aged 1 Article 1 Cessation fatigue Female 1 Health Behavior 1 Humans 1 Longitudinal Studies 1 Male 1 Middle Aged 1 Motivation 1 Nicotine 1 Nicotine dependence 1 Quitting 1 Recurrence 1 Relapse 1 Smoking 1 Smoking Cessation 1 Smoking cessation 1 Substance Withdrawal Syndrome 1 Tobacco Use Disorder 1 Young Adult 1 adolescent 1 adult 1 aged 1 cessation fatigue 1 cessation fatigue scale 1 construct validity 1