Wearable Robotics: Challenges and Trends Proceedings of the 4th International Symposium on Wearable Robotics, WeRob2018, October 16-20, 2018, Pisa, Italy - Carrozza, Maria Chiara; Carrozza, Maria Chiara; Micera, Silvestro; Micera, Silvestro; Pons, José L.; Pons, José L. (Springer International Publishing : Imprint: Springer, 2019)