"Dietary and Supplemental Calcium Intake and Cardiovascular Disease Mortality" JAMA Intern Med Feb 2013
http://archinte.jamanetwork.com/article.aspx?articleid=1568523
"Conclusions and Relevance 
Our findings suggest that high intake of supplemental calcium is associated with an excess risk of CVD death in men but not in women. Additional studies are needed to investigate the effect of supplemental calcium use beyond bone health."

"Comparative Effectiveness of Alternative Prostate-Specific Antigen–Based Prostate Cancer Screening Strategies"
Ann Intern Med Feb 2013
http://annals.org/article.aspx?articleid=1567368
"Conclusion: Compared with standard screening, PSA screening strategies that use higher thresholds for biopsy referral for older men and that screen men with low PSA levels less frequently can reduce harms while preserving lives."