en RESEARCH PAPER Decision-making, interobserver variation, Osteoarthritis, Surgery, Trapeziometacarpal arthrosis, Treatment 158 166 https://abjs.mums.ac.ir/article_16525.html Stéphanie J.E. Becker sjebecker@gmail.com 70522 No Department of Plastic, Reconstructive and Hand Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands Wendy E. Bruinsma w.e.bruinsma@gmail.com 70523 No Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands Thierry G. Guitton guitton@gmail.com 70524 No Department of Plastic Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands Chantal M.A.M. van der Horst c.m.vanderhorst@amsterdamumc.nl 70525 No Department of Plastic, Reconstructive and Hand Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands Simon D. Strackee s.d.strackee@amsterdamumc.nl 70526 No Department of Plastic, Reconstructive and Hand Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands David Ring david.ring@austin.utexas.edu 70527 Yes Department of Surgery and Perioperative Care, Dell Medical School at the University of Texas at Austin, Austin, TX, USA