1. Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy;
2. Institute for Maternal and Child Health – IRCCS “Burlo Garofolo”, Trieste, Italy;
3. Department of Genetics, Federal University of Pernambuco, Recife, Brazil;
4. Gertrude H. Sergievsky Center and Department of Epidemiology, Mailman School of Public Health, Columbia University, NY, USA