1. Department of Psychiatry, New York State Psychiatric Institute, Columbia University, New York City (Duarte, Lovero, Sourander); Care Policy and Evaluation Centre, London School of Economics and Political Science, London (Sourander); Department of Child Psychiatry, University of Turku, Turku, Finland (Ribeiro); Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil (Bordin).