関連キーワード
1. Seasonal affective disorder (SAD)
2. Mood disorders
3. Mental health
4. Depression
5. Seasonal changes
6. Light therapy
7. Circadian rhythm
8. Biological clock
9. Phototherapy
10. Melatonin
11. Serotonin
12. Vitamin D
13. Sleep disturbances
14. Social support
15. Psychosocial factors
16. Seasonal variations
17. Climate factors
18. Weather changes
19. Winter blues
20. Psychological wellbeing
21. Cognitive functioning
22. Occupational impact
23. Productivity
24. Risk factors
25. Treatment options
26. Prevention strategies
27. Resilience
28. Epidemiology
29. Genetic factors
30. Cross-cultural perspectives