Universal Access in Human-Computer Interaction. Multimodality and Assistive Environments 13th International Conference, UAHCI 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Orlando, FL, USA, July 26-31, 2019, Proceedings, Part II - Antona, Margherita; Antona, Margherita; Stephanidis, Constantine; Stephanidis, Constantine (Springer International Publishing : Imprint: Springer, 2019)