Comparison of the Parker flex tip and the unoflex reinforced endotracheal tube for orotracheal fibreoptic intubation in simulated difficult intubation patients oleh Rupesh Narhari, Wan Mohd Nazaruddin Wan Hassan, Rhendra Hardy Mohamad Zaini, Sanihah Che Omar, Nik Abdullah Nik Mohamad, Praveena Seevaunnamtum