Al Lawati, R., Al Abri, M. A., Kuppuswamy, B., Al-Kharousi, A., Al-Atbi, A. Y., Rizvi, S. and Dikshit, M. (2019) “The Effect of Change in Posture on Spirometry in Patients with Obstructive Sleep Apnoea Syndrome”, Sultan Qaboos University Medical Journal, 19(4), pp. e310–315. doi: 10.18295/squmj.2019.19.04.006.