The impact of selected methodological factors on data collection outcomes in observational studies of device-measured physical behaviour in adults: A systematic review by Richard M. Pulsford, Laura Brocklebank, Sally A. M. Fenton, Esmée Bakker, Gregore I. Mielke, Li-Tang Tsai, Andrew J. Atkin, Danielle L. Harvey, Joanna M. Blodgett, Matthew Ahmadi, Le Wei, Alex Rowlands, Aiden Doherty, Vegar Rangul, Annemarie Koster, Lauren B. Sherar, Andreas Holtermann, Mark Hamer, Emmanuel Stamatakis

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