[1] Department of Odontostomatological and Maxillofacial Sciences,
[2] Division of Oral Medicine,undefined
[3] University of Naples Federico II,undefined
[4] School of Dentistry,undefined
[5] via Pansini 5,undefined
[6] 80131 Naples,undefined
[7] Italy,undefined
[8] Institute of Odontostomatological Sciences,undefined
[9] University of Ancona,undefined
[10] School of Dentistry,undefined
[11] Ancona,undefined
[12] Italy,undefined
[13] Residents,undefined
[14] Department of Odontostomatological and Maxillofacial Sciences,undefined
[15] Division of Oral Medicine,undefined
[16] University of Naples Federico II,undefined
[17] School of Dentistry,undefined
[18] via Pansini 5,undefined
[19] 80131 Naples,undefined
[20] Italy,undefined