Khan, T. A.; Zakia Gul; Muhammad Abdul Basit Ashraf; Umar Usman; Mehr Muhammad Imran; Zaheer Ahmad. Obstructive Sleep Apnea in Patients With Difficult to Treat Asthma: Obstructive Sleep Apnea in Patients With Difficult to Treat Asthma. apmc 2024, 18, 222-226.