Evaluation of the likelihood of reflux developing in patients with recurrent upper respiratory infections, recurrent sinusitis or recurrent otitis seen in ear-nose-throat outpatient clinics - Zerrin Önal; Fügen Çullu-Çokuğraş; Hüseyin Işıldak; Asım Kaytaz; Tufan Kutlu; Tülay Erkan; Gülen Doğusoy (The Turkish Journal of Pediatrics)