How can we prove that a preventive measure in elite sport is effective when the prevalence of the injury (eg, ACL tear in alpine ski racing) is low? A case for surrogate outcomes
Josef Kröll, Jörg Spörri, Sophie Elspeth Steenstrup, Hermann Schwameder, Erich Müller, Roald Bahr
British Journal of Sports Medicine Dec 2017, 51 (23) 1644-1645; DOI: 10.1136/bjsports-2016-097020