The authors would like to apologise for an incorrect affiliation given for one of the co-authors of this published paper.
Incorrect affiliation
Health Services Research Unit, Instituto Hospital del Mar de Investigaciones Médicas, Institut de Recerca Hospital del Mar, Barcelona, Spain
Correct affiliation
Health Services Research Unit, IMIM-Hospital del Mar Medical Research Institute, Barcelona, Spain; CIBER en Epidemiología y Salud Pública (CIBERESP), Spain; Pompeu Fabra University (UPF), Barcelona, Spain.