Will We Do If We Can? Habitual Qualitative and Quantitative Physical Activity in Multi-Morbid, Older Persons with Cognitive Impairment. - Bastian Abel; Martin Bongartz; Tobias Eckert; Phoebe Ullrich; Rainer Beurskens; Sabato Mellone; Jürgen M. Bauer; Sallie E. Lamb; Klaus Hauer (Sensors, 2020)