“Physical activity levels in adults and elderly from triaxial and uniaxial accelerometry. The Tromsø Study,” by Edvard H. Sagelv, Ulf Ekelund, Sigurd Pedersen, Søren Brage, Bjørge H. Hansen, Jonas Johansson, Sameline Grimsgaard, Anna Nordström, Alexander Horsch, Laila A. Hopstock, and Bente Morseth (PLoS ONE 14(12): e0225670. doi.org/10.1371/journal.pone.0225670, XML. HTML, and .pdf format, 17p.).
journals.plos.org/plosone/article?id=10.1371/journal.pone.0225670
