Thomas Apard is a European Board certified hand surgeon specializing in ultrosonosurgery in Versailles, France. In 2012, he developed an ultrasonography diploma course for orthopedic surgeons in France. He published a book on ultrasonography in orthopedic surgery in 2016, and is the author of more than 21 articles.Jean Louis Brasseur is a radiologist with 30 years of experience in sports medicine and ultrasonography. He serves as a consultant for the Olympic games, the Paris SG football team and the French National Institute of Sport. He is the author of over 20 books and more than 39 articles.