Deborah Lupton works across the Centre for Social Research in Health and the Social Policy Research Centre at UNSW Sydney, and leads the Vitalities Lab. Her latest authored books are The Quantified Self (2016), Digital Health (Routledge, 2017), Fat, 2nd edition (Routledge, 2018) and Data Selves (2019).

Zeena Feldman is Lecturer in Digital Culture at King's College London, where she leads the Quitting Social Media Project. Her work examines intersections between online communication, technology and everyday life, and has appeared in Information, Communication & Society, TripleC and OpenDemocracy, and on BBC Radio 3 and 4.