[1] Univ Indonesia, Dr Cipto Mangunkusumo Hosp, Dept Otorhinolaryngol Head & Neck Surg, Div Facial Plast Reconstruct,Fac Med, Jakarta, Indonesia
[2] Univ Indonesia, Dr Cipto Mangunkusumo Hosp, Dept Otorhinolaryngol Head & Neck Surg, Div Larynx Pharynx,Fac Med, Jakarta, Indonesia
[3] Univ Indonesia, Dr Cipto Mangunkusumo Hosp, Dept Otorhinolaryngol Head & Neck Surg, Fac Med, Salemba Raya 6, Jakarta 10430, Indonesia