1. Faculty of Medicine, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia, Indonesia
2. Department of Otorhinolaryngology-Head & Neck Surgery, Faculty of Medicine, Diponegoro University, Semarang, Indonesia, Indonesia
3. Department of Radiology, Faculty of Medicine, Diponegoro University, Semarang, Indonesia, Indonesia