The incidence of rugby-related catastrophic injuries (including cardiac events) in South Africa from 2008 to 2011: a cohort study
James Craig Brown, Mike I Lambert, Evert Verhagen, Clint Readhead, Willem van Mechelen, Wayne Viljoen
BMJ Open Jan 2013, 3 (2) e002475; DOI: 10.1136/bmjopen-2012-002475