Staartjes, Victor E;Molliqaj, Granit;van Kampen, Paulien M;Eversdijk, Hubert A J;Amelot, Aymeric;Bettag, Christoph;Wolfs, Jasper F C;Urbanski, Sophie;Hedayat, Farman;Schneekloth, Carsten G;Abu Saris, Mike;Lefranc, Michel;Peltier, Johann;Boscherini, Duccio;Fiss, Ingo;Schatlo, Bawarjan;Rohde, Veit;Ryang, Yu-Mi;Krieg, Sandro M;Meyer, Bernhard;Kögl, Nikolaus;Girod, Pierre-Pascal;Thomé, Claudius;Twisk, Jos W R;Tessitore, Enrico;Schröder, Marc L.The European Robotic Spinal Instrumentation (EUROSPIN) study: protocol for a multicentre prospective observational study of pedicle screw revision surgery after robot-guided, navigated and freehand thoracolumbar spinal fusion..BMJ Open.2019.9.9