Erratum to: Sophono Alpha System and subtotal petrosectomy with external auditory canal blind sac closure.
Organi di Senso Department, University "la Sapienza", Rome, Italy, giuseppemagliuloorl@yahoo.com.
Giuseppe
G
Magliulo
Rosaria
R
Turchetta
Giannicola
G
Iannella
Riccardo
R
Valperga di Masino
Marco
M
de Vincentiis