Combined laryngopharyngeal reflux and obstructive sleep apnea (CLOSA) - Salivary pepsin test for laryngopharyngeal reflux in obstructive sleep apnea patients. - Shen SC; Chiang YT; Tseng LW; Lu CT; Lin WN; Lee LA; Fang TJ; Cheng WN; Li HY (Tzu chi medical journal, 2025)