ARTICLE Schutz_SCIENTIFICREPORTS_2019/IDIAP Validity of pervasive computing based continuous physical activity assessment in community-dwelling old and oldest-old Schütz, Narayan Saner, Hugo Rudin, Beatrice Botros, Angela Pais, Bruno Santschi, Valérie Buluschek, Philipp Gatica-Perez, Daniel Urwyler, Prabitha Marchal-Crespo, Laura Müri, René M. Nef, Tobias EXTERNAL http://publications.idiap.ch/attachments/papers/2019/Schutz_SCIENTIFICREPORTS_2019.pdf PUBLIC Scientific Reports 9 9662 2019