Hospital For Special Surgery. Sports Medicine Service. Dr. Russell Warren New York. USA. 1988
Hospital for Sick Children Pediatric Orthopaedics. London. Dr. Fixen. 1995
Steadman-Hawkins Clinic. Hip arthroscopy. Dr Marc Philippon Vail Colorado USA. 2008
Oklahoma Sports Science and Orthopaedics. Artroscopia de cadera y síndrome piramidal y gluteo profundo. Deep gluteal syndrome and hip impingement. Oklahoma. USA. Dr Hal Martin. 2011
Hip Preservation Unit. Baylor Hospital. Dallas. USA. Dr Hal Martin 2016