Wanchai used to be a noisy sleeper. His loud snoring not only annoyed his children but also made them worry that he might have an underlying health problem.
A patient undergoing an overnight sleep study.
"My daughter told me that she could hear my breath catch once in a while during the night when she passed my bedroom. That sometimes scared her as she thought that I had stopped breathing," said the 69-year-old retired army officer who now works for a company.
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