1. North Cumbria Integrated Care, NHS Foundation Trust, Carlisle, UK
2. Department of Allied Health Sciences, UConn Center for mHealth and Social Media, Institute for Collaboration on Health, Intervention and Policy, University of Connecticut, Storrs, CT, USA
3. Computational Biology Division, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
4. Department of Health Promotion and Education, School of Public Health, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana