Physical therapy for sleep apnea: a smartphone application for home-based physical therapy for patients with obstructive sleep apnea oleh Khue Bui-Diem, Ching-Hsia Hung, Guan-Cheng Zhu, Nguyen Van Tho, Thu Nguyen-Binh, Quan Vu-Tran-Thien, Duy To-Truong, Hoan Ngo-Thanh, Sy Duong-Quy, Sy Duong-Quy