Therapeutic Effects of Slow Deep Breathing on Cardiopulmonary Function, Physical Performance, Biochemical Parameters, and Stress in Older Adult Patients with Long COVID in Phayao, Thailand. - Promsrisuk, Tichanon; Srithawong, Arunrat; Kongsui, Ratchaniporn; Sriraksa, Napatr; Thongrong, Sitthisak; Kloypan, Chiraphat; Muangritdech, Nattha; Khunkitti, Kit; Thanawat, Thanakorn; Chachvarat, Petcharaporn (Annals of Geriatric Medicine & Research, 2025)