[1] Department of Public Health, Universitat de Barcelona, Barcelona, Spain
[2] Epidemiology Service, Public Health Agency of Barcelona, Barcelona, Spain
[3] Area of Biostatistics, Universitat Internacional de Catalunya, Barcelona, Spain
[4] CIBER de Epidemiología y Salud Pública (CIBERESP), Spain
[5] Department of Statistics and Operations Research, Universitat Politècnica de Catalunya, BARCELONATECH, Barcelona, Spain
[6] Statistics Unit, Dalarna University, Falun, Sweden