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Private Practice Zapopan, JALISCO MEXICO Academic history Medical surgeon title. Autonomous University of Guadalajara UAG, Guadalajara, Jalisco. • Title of trauma and orthopedic surgeon. Mexican Institute of Social Security IMSS. • Ignacio García Téllez National Medical Center, Mérida, Yucatán. Hospital of Orthopedics and Traumatology Victoriano de la Fuente Narváez, Mexico D. F. • Certified by the Mexican Council of Orthopedics and Traumatology A. C. AMOT, México, D. F. since 2007. • Title approved as a Bachelor of Medicine in Spain EU. • Training in Arthroscopic Surgery. Keerland Job Orthopedic Center, Los Angeles, California, US. • Training in Shoulder Arthroscopy West Kendal Surgical Center, Miami Florida USA. • Training in Shoulder Arthroscopy. The Orthopedic Institute with Dr. Stephen Burckhard, San Antonio Texas USA. • Training in Cartilage Reconstruction. Wroclow Medical University, Poland EU. Societies to which he belongs Mexican Society of Orthopedics, A. C. • Medical College of Orthopedics of Jalisco, A. C. • Jalisco Medical Association, A. C. • Mexican Association of Professional Soccer Doctors A. C. • Mexican Association of Articular Reconstructive Surgery and Arthroscopy. • Mexican Society of Hip Surgery. • International Cartilage Repair Society ICRS. • International Society of arthroscopy, Knee Surgery & Orthopedic Sports Medicine ISAKOS. Professional experience Physician assigned to the Traumatology and Orthopedics service, Mexican Institute of Social Security, Regional General Hospital No. 180. Guadalajara, Jalisco, Mexico (2003-2015). • Medical coordinator in the Vitamédica Traumatology Service at Puerta de Hierro hospitals. Guadalajara, Jalisco, Mexico (2009-2010). • Head of the Department of Orthopedics and Traumatology at Sport Med, FIFA Clinic of Excellence. Guadalajara, Jalisco, Mexico (2009-2014). • Deputy Director of the Institute for Musculoskeletal Research and Cartilage Repair of Guadalajara, Jalisco, Mexico (2009-2014). • Physician assigned to the Orthopedics and Traumatology service at the Instituto de Pensiones del Estado de Jalisco IPEJAL, Guadalajara, Jalisco, México (2013-2014). • Physician assigned to the Articular Surgery and Sports Medicine service of OrthoSport GDL, Orthopedic Medicine and Sports Medicine clinic, Guadalajara, Jalisco, Mexico (2014-2016). • Founding Partner of Rehabiltem Center for Sports Medicine and physical therapy. Guadalajara Jalisco Mexico (2016 -). • Head of the Orthopedics and Traumatology service. Sao Paulo Hospital. Guadalajara jalisco Mexico (2020-) www.drnicolasvalladares.com ISAKOS Active Member
2026 Vol. III Editor's Message Iftach Hetsroni, MD, Associate Prof., ISRAEL Claudia Arias, MD, PERU Nikolaos K. Paschos, MD, PhD, UNITED STATES2026 Vol. III President's Message João Espregueira-Mendes, MD, PhD, Full Prof., PORTUGAL2026 Vol. III JISAKOS Editor in Chief's Message Olufemi R. Ayeni, MD, PhD, MSc, FRCSC, CANADABeyond the P Value: From Statistical Metrics to Clinical Decision-Making Luciano Rossi, PhD, ARGENTINA Ignacio Pasqualini, MD, ARGENTINAUnrestricted Kinematic Alignment TKA in Asian Knees: Restoring Native Alignment Without Crossing the Safety Line Ken Okazaki, MD, PhD, Prof., JAPANMedial Opening-Wedge High Tibial Osteotomy: To Fill or Not to Fill the Gap Tomás Pineda, MD, CHILE Thomas Neri, MD, PhD, Prof., FRANCE Matthieu Ollivier, Prof, MD, PhD , FRANCEAcetabular Depth is Your Friend: Adequate Rim Resection in Femoroacetabular Impingement Surgery Remains a Challenge Joshua Sapong Knudsen, FRACS (Ortho), MBChB, NEW ZEALAND Matthew J. Brick, MBChB, FRACS, NEW ZEALANDEuropean Union Regulation on Substances of Human Origin (SoHO): What You Need to Know! Theodorakys Marín Fermín, MD, VENEZUELA Angelo Vasileios Vasiliadis, MD, MSc, PhD, GREECE Tiago Lazzaretti Fernandes, MD, PhD, MSc, Post-Doctorate, Professor, BRAZIL Michail I. Iosifidis, MD, PhD, GREECE Norimasa Nakamura, MD, PhD, JAPAN Fabio Valerio Sciarretta, MD, ITALYThe FORUM Fellowship: Learning, Leadership, and the Power of Women in Orthopaedics Claudia Arias, MD, PERU Camila Cohen Kaleka, MD, PhD, BRAZILJISAKOS at Ten: A Journal, a Crew, and a Safe Anchorage for ISAKOS Philippe Noel Neyret, MD, PhD, Prof., FRANCE Jon Karlsson, MD, PhD, Prof., SWEDEN Volker Musahl, MD, Prof., UNITED STATES Olufemi R. Ayeni, MD, PhD, MSc, FRCSC, CANADA João Espregueira-Mendes, MD, PhD, Full Prof., PORTUGAL2026 ISKAOS Knee Arthroplasty Forum: Highlights from Brussels, Belgium Claudia Arias, MD, PERUFrom Idea to Impact: How an ISAKOS Research Grant Enabled High-Quality Orthobiologics Research in a Limited-Resource Setting Theodorakys Marín Fermín, MD, VENEZUELAFrom a Clinical Question to Clinical Research: The Impact of an ISAKOS Research Grant Nicolas Valladares, MD, MEXICO
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