Steps against the burden of Parkinson’s disease (StepuP): Protocol of a randomized controlled trial elucidating the biomechanical and neurophysiological mechanisms of a speed dependent treadmill training intervention - Anina Moira van Leeuwen; Julius Welzel; Ilaria D’Ascanio; Charlotte Lang; Vaishali Vinod; Pia Görrisen; Johanna Geritz; Clint Hansen; Eran Gazit; Shahar Siman Tov; Revital Prusak; Ilaria Casadei; et al. (PLoS ONE, 2026)