1 Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University of Palermo, Via Liborio Giuffrè, Palermo, Italy. Electronic address: claudia.colomba@libero.it.
2 Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University of Palermo, Via Liborio Giuffrè, Palermo, Italy. Electronic address: laura.sapo@tin.it.
3 Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University of Palermo, Via Liborio Giuffrè, Palermo, Italy.
4 Department of Surgical, Oncological and Stomatological Disciplines, University of Palermo, Via Liborio Giuffrè, Palermo, Italy. Electronic address: giuseppina.campisi@unipa.it.
5 Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University of Palermo, Via Liborio Giuffrè, Palermo, Italy. Electronic address: paola.dicarlo@unipa.it.
6 Department of Surgical, Oncological and Stomatological Disciplines, University of Palermo, Via Liborio Giuffrè, Palermo, Italy. Electronic address: panzarella@odonto.unipa.it.
7 Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University of Palermo, Via Liborio Giuffrè, Palermo, Italy. Electronic address: valentina.caputo@unipa.it.
8 Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University of Palermo, Via Liborio Giuffrè, Palermo, Italy. Electronic address: Antonio.cascio03@unipa.it.