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They can be enjoyed by everyone, from beginners to professionals

Healthline: What You Need to Know About Smoking and Your Brain National Library of Medicine: Short- and Long-Term Consequences of Nicotine Exposure during Adolescence for Prefrontal Cortex Neuronal Network Function Smarmore Castle: Coffee and Cigarettes Side Effects A Really Bad Combination Kwit: Is it a Good Idea to Mix Nicotine and Caffeine Quora: Why Do Coffee and Cigarettes Taste So Good

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Consulting a Quickobook doctor or a general physician can help identify the root cause and guide treatment

Make Time for Quality Sleep Ventilate your bedroom before bed and get about 7-8 hours of sleep each night

hence, these values were log-transformed for linear regression analyses
