Hejazi, M. E., M. Rezazadehsaatlou, L. Namvar, A. Sadeghi, V. Hejazi, Y. Hejazi, and K. B. Aghazadeh. “Safety of Bronchoscopic Guided Percutaneous Dilatational Tracheostomy in ICU Patients in Tabriz City”. Universa Medicina, vol. 36, no. 3, Oct. 2017, pp. 173-8, doi:10.18051/UnivMed.2017.v36.173-178.