1. Department of Orthopaedics, Erasmus MCUniversity Medical CenterWytemaweg 803015CN Rotterdamthe Netherlands
2. Arthritis and Regenerative Medicine LaboratoryAberdeen Centre for Arthritis and Musculoskeletal HealthInstitute of Medical SciencesUniversity of AberdeenAberdeenUnited Kingdom
3. Department of Otorhinolaryngology, Erasmus MCUniversity Medical CenterRotterdamthe Netherlands