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Rui Min Lee, Geak Poh Tan, Ser Hon Puah, Li Min Ling, Chiaw Yee Choy, Sanjay H Chotirmall, John Abisheganaden, Jee Jian See, Hui Ling Tan, Yu-Lin Wong. "Physiological Changes During Prone Positioning in COVID-19 Acute Respiratory Distress Syndrome." Annals of the Academy of Medicine, Singapore 49.7 (2020) 509-513