<p>Formel professor ENT department, school of medecine, Ferhat Abbas university, Sétif . Algeria</p> <p>President of setif otolaryngology society “AOS”</p> <p>Executif board member of ANOL “association nationale des ORL libéraux”</p> <p>Executif Board member of MSOA “mediterranean society of otology and audiology”</p>