1. Public Health Unit, Department of Surgery and Medical Sciences, School of Medicine University of Alcalá Alcalá de Henares Spain
2. Directorate of Research, Institute of Fiscal Studies (IEF) Ministry of Finance Madrid Spain
3. Department of Statistics and Data Science Complutense University of Madrid Madrid Spain
4. Department of Epidemiology & Biostatistics, Graduate School of Public Health & Health Policy City University of New York New York USA