1. Fibrosis Research Group, Institute of Cellular MedicineNewcastle UniversityNewcastle upon Tyne NE2 4HH United Kingdom
2. Musculoskeletal Unit, Department of Orthopaedics, Freeman Hospital, Newcastle HospitalsNHS TrustNewcastle upon Tyne NE7 7DN United Kingdom
3. School of Mathematics & StatisticsNewcastle UniversityNewcastle upon Tyne NE2 4HH United Kingdom