"Nonemergency PCI at Hospitals with or without On-Site Cardiac Surgery"  
NEJM Mar 11
http://www.nejm.org/doi/full/10.1056/NEJMoa1300610?query=featured_home
"CONCLUSIONS

Nonemergency PCI procedures performed at hospitals in Massachusetts without on-site surgical services were noninferior to procedures performed at hospitals with on-site surgical services with respect to the 30-day and 1-year rates of clinical events. (Funded by the participating hospitals without on-site cardiac surgery; MASS COM ClinicalTrials.gov number, NCT01116882.)"

"Cognitive function and other risk factors for mild traumatic brain injury in young men: nationwide cohort study"
BMJ Mar 13  
http://www.bmj.com/content/346/bmj.f723