GREEK

A. Aletras: University of Patras, Medical School, Orthopaedic Clinic (E. Panagiotopoulos, S. Syggelos)

D. Vynios: University of Patras, Medical School, ENT Clinic (V. Daniilidis, S. Naxakis, N. Mastronikolis)

INTERNATIONAL

D. Vynios: University of Reims, Medical School, Extracellular Matrix Laboratory, France (S. Brezillon)

A. Theocharis: University of Creteil, France (E. Hue)