Mara Pereira Guerreiro obtained her PhD in Pharmaceutical Sciences from the University of Manchester (UK). She held a senior post at the Nursing School of Lisbon, Portugal, where she led research and innovation projects in the field of digital health and education, including Train4Health, funded by the Erasmus+ programme of the European Union. More recently, she took a post of Associate Professor at Egas Moniz University, Portugal. Isa Raquel Brito Santos Pereira Félix has a PhD in Nursing (University of Lisbon, Portugal). She is an early career investigator in the Nursing School of Lisbon. Her research is focused on the application of behavioral science to the development of interventions to support self-care of people with chronic health conditions, using both digital and non-digital modes of delivery. Isa held the position of Train4Health project manager. Marta Moreira Marques holds a PhD in Health Psychology (Leiden University, Netherlands). She is a senior research fellow at the NOVA Medical School (Portugal), and holds honorary research positions at Trinity College Dublin (Ireland) and University College London (UK). Her research focuses on the methods for advancing the science of behaviour change, and in applying them to the development and evaluation of complex health behaviour change interventions.