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Ong, Kian C., Alan W. Ng, Lawrence S. Lee, Gregory Kaw, Seow Khee Kwek, Melvin K. Leow, và Arul Earnest. "Pulmonary Function and Exercise Capacity in Survivors of Severe Acute Respiratory Syndrome." Chest 2004.

Ong, Kian C., et al. "Pulmonary Function and Exercise Capacity in Survivors of Severe Acute Respiratory Syndrome." Chest 2004.