1 Division of head and neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Via Olgettina, 60, 20132 Milan, Italy; School of Medicine, Vita-Salute San Raffaele University, Milan, Italy.
2 Division of head and neck, Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Via Olgettina, 60, 20132 Milan, Italy; School of Medicine, Vita-Salute San Raffaele University, Milan, Italy. Electronic address: giuseppe.querques@hotmail.it.