Chana, Prem, Mark Joy, Neil Casey, David Chang, Elaine M Burns, Sonal Arora, Ara W Darzi, Omar D Faiz, and Carol J Peden. 2017. “Cohort analysis of outcomes in 69 490 emergency general surgical admissions across an international benchmarking collaborative.” BMJ Open 7 (3): e014484. doi:10.1136/bmjopen-2016-014484. http://dx.doi.org/10.1136/bmjopen-2016-014484.