Li Ogilvie, Vickie, Nicola M. Kayes, and Paula Kersten. “The Nijmegen Questionnaire: A Valid Measure for Hyperventilation Syndrome”. New Zealand Journal of Physiotherapy 47, no. 3 (November 1, 2019): 160–171. Accessed November 24, 2024. https://nzjp.otago.ac.nz/nzjp/article/view/239.