1. Primary Care Musculoskeletal Unit Area V, Servicio de Salud del Principado de Asturias, SESPA Gijón Spain
2. Unit of Hand Surgery, Department of Orthopedics Medcare Orthopedics and Spine Hospital Dubai United Arab Emirates
3. Department of Physical and Rehabilitation Medicine University Hospital La Paz Madrid Spain
4. Department of Orthopaedic Surgery University Hospital Gregorio Marañón Madrid Spain
5. Ecografías América Madrid Spain