Occupations, Aging, Healthcare Workers, Flight Crew, Farmers, Professional Chefs, Military Personnel, Stress, Cortisol, Sleep Deprivation, UV Exposure, DNA Damage, Lifestyle Habits, Health Check-ups, Safety Measures, Circadian Rhythm, Chronic Stress, Inflammation, Oxidative Stress, Cellular Damage, Premature Aging, Exercise, Balanced Diet, Quality Sleep, Early Detection, Preventive Care, Occupational Hazards, Radiation Exposure, Pesticide Exposure, Job-related Aging