Ms.Dipali Rana. Effect of Verbal Encouragement and Visual Biofeedback on Peak Expiratory Flow Rate in Healthy Young Subjects. Int. J. of Allied Med. Sci. and Clin. Res. [Internet]. 2020 Aug. 6 [cited 2026 Apr. 16];4(3):517-21. Available from: https://ijamscr.com/ijamscr/article/view/299