Prevalence of Laryngopharyngeal Reflux Symptoms, Dysphonia, and Vocal Tract Discomfort in Amateur Choir Singers. - Robotti C; Schindler A; Lechien JR; Di Sabatino A; Capobianco S; Ottaviani F; Sims HS; Bertino G; Benazzo M; Mozzanica F (Journal of voice : official journal of the Voice Foundation, 2023)