Byeon H. The Combined Effects of Lee Silverman Voice Treatment and Abdominal Respiration on the Maximum Phonation Time in Parkinson’s Disease. IJET [Internet]. 2018 Dec. 13 [cited 2024 Nov. 22];7(4.39):86-9. Available from: https://sciencepubco.com/index.php/ijet/article/view/23712