Increased Breast Cancer Risk with Sleep Pattern Disruptionshttp://articles.mercola.com/sites/articles/archive/2008/01/02/breast-cancer-risk.aspxThe increased risk of breast cancer seen in Finnish flight attendants may be due to disruption of sleep-wake cycles and a consequent reduction in melatonin production. Researchers found that flight attendants had a 1.87 relative risk of breast cancerenCommunityServer 2008.5 SP1 (Build: 31106.3070)