4 Department of Neurosciences, Psychology, Drug Research and Child Health (NeuroFarBa), Tuscan Regional Centre of Pharmacovigilance and Pharmacoepidemiology, University of Florence, Italy.
5 Centre for Clinical Epidemiology, Lady Davis Institute, Jewish General Hospital, Montreal, QC, Canada.
6 Dept of Epidemiology and Biostatistics, McGill University, Montreal, QC, Canada.