Tariq, M.W., Khan, T., Pervaiz, S., Atiq ul Mannan, M., Ghulam Murtaza, H. and Naveed, A. 2020. Frequency of Undiagnosed Hypoxia in Patients admitted in Chest wards of Nishtar Hospital Multan using pulse oximeter. Pakistan Journal of Chest Medicine. 26, 1 (Sep. 2020), 22–27.