•Contributors to the work performed by the Parisian team: Yann Nguyen^1,2, Mathieu Miroir¹, Guillaume Kazmitcheff¹, Evelyne Ferrary^1,2, Daniele Bernardeschi^1,2, Stephane Mazalaigue³, Armand Czaplinski³, Renato Torres¹, Daniele De Seta^1,4, Alexis Bozorg Grayeli¹, Jérome Szewczyk⁵, Olivier Sterkers^1,2.

¹ Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Inserm, Unité “Réhabilitation chirurgicale mini-invasive et robotisée de l’audition”, Paris, France; ² AP-HP, GHU Pitié-Salpêtrière, Service ORL, Otologie, implants auditifs et chirurgie de la base du crâne, Paris, France; ³ Collin ORL, Bagneux, France; ⁴ Sapienza University, Roma, Italy; ⁵ Institut des Systèmes Intelligents et de Robotique (ISIR); Université Pierre et Marie Curie, Paris, France

Acknowledgments: The authors would like to acknowledge Collin ORL (Bagneux, France), Oticon Medical (Vallauris France), La Fondation Agir pour l’Audition, Advance Bionics (Valencia, USA) and MED-EL GmbH (Innsbruck, Austria) for their financial support.

•Contributors to the work performed by the Bern Team: Stefan Weber¹, Kate Gavaghan¹, Nicolas Gerber¹, Tom Williamson¹, Wilhelm Wimmer^1,2, Georgios Mantokoudis², Juan Ansò¹, Christoph Rathgeb¹, Arne Feldmann³, Franca Wagner⁴, Christian Weisstanner⁴, Masoud Zoka-Assadi⁵, Kai M. Roesler⁶, Olivier Scheidegger⁶, Lukas Anschuetz², Markus Huth², Martin Kompis², Marco Caversaccio²

¹ ARTORG Center for Biomedical Engineering Research, University of Bern, Switzerland; ² Department of ENT, Head and Neck Surgery, Inselspital, University Hospital of Bern, Switzerland; ³ Institute for Surgical Technologies and Biomechanics, University of Bern, Switzerland; ⁴ University Institute of Diagnostic and Interventional Neuroradiology, Inselspital, University of Bern, Switzerland; ⁵ MED-EL Corporation, Innsbruck, Austria; ⁶ Department of Neurology, Inselspital, University of Bern, Switzerland

Acknowledgments: The authors would like to acknowledge Brett Bell, Manuel Stebinger, Marco Matulic, Leatitia Perroud, Fabian Zobrist, Claude Jolly, Mauricio Reyes, Philippe Zysset and Philippe Büchler for the scientific contributions made to the presented system and related work. Additionally, the authors would like to thank the department of ENT surgery and Neuroradiology of the Bern University Hospital, particularity Nexhmedin Avdija, Susanne Hoffman, Nadja Feusi and Patrick Mühlethaler for their contributions to the presented clinical case. This work received funding from the Swiss National Science Foundation (Nano-Tera Initiative, HearRestore Project), the European Commission (under the HEAR-EU project, grant number: 304857), the Swiss Commission for Technology and Innovation, CAScination AG (Bern, Switzerland) and MED-EL GmbH (Innsbruck, Austria).

•Acknowledgments by the Vanderbildt team: The authors would like to acknowledge the following grants, NIDCD R01DC008408 Clinical Validation and Testing of Percutaneous Cochlear Implantation NIDCD R01DC012593 Safe, Rapid Access to the Internal Auditory Canal for Acoustic Neuroma.

•We would also like to acknowledge Dr Heinrich and Dr Zhang for providing pictures of their device.