Salivary pepsin exposure in children with upper-airway symptoms: limited discrimination by RSI/RFS/RSS and diurnal patterns. - Li C; Wang C; Huang S; Zhang Y; Song F; Zhang C; Li X; Cheng M; Ye J; Yue G; Yin G (European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery, 2026)