Mohammadzadeh , A., Haghighi , M., Naderi , B., Chaudhry , A., Hussain Khan , Z., Rasouli , M. R. and Saadat , S. (2011) “Comparison of two different methods of fiber-optic nasal intubation: conventional method versus facilitated method (NASAL-18)”, Upsala Journal of Medical Sciences, 116(2), pp. 138–141. doi: 10.3109/03009734.2010.534827.