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Prospective Study
Dutch version of the Victorian Institute of Sports Assessment-Achilles questionnaire for Achilles tendinopathy: Reliability, validity and applicability to non-athletes 
Inger Sierevelt, Maayke van Sterkenburg, Hans Tol, Bella van Dalen, Niek van Dijk, Daniel Haverkamp 
World J Orthop 9(1):1-6. Published online Jan 18, 2018. doi: 10.5312/wjo.v9.i1.1