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Cosmic rays and circadian disruption as risk factors for breast cancer
| Cosmic radiation | Liu et al.39 | 2016 | Meta-analysis | Increased risk of breast cancer relative to the general population. | Flight attendants |
| Circadian disruption | Schubauer-Berigan et al.40 | 2015 | Cohort study | Increased risk of cancer relative to the general population; however, the incidence of breast cancer was not related to cosmic radiation or circadian disruption. | Flight attendants |
