Long-Term Effectiveness and Sustainability of Integrating Peer-Assisted Ultrasound Courses into Medical School—A Prospective Study oleh Johannes Matthias Weimer, Nina Widmer, Kai-Uwe Strelow, Paula Hopf, Holger Buggenhagen, Klaus Dirks, Julian Künzel, Norbert Börner, Andreas Michael Weimer, Liv Annebritt Lorenz, Maximilian Rink, Henrik Bellhäuser, Lina Judit Schiestl, Roman Kloeckner, Lukas Müller, Julia Weinmann-Menke