NEW YORK (CBSNewYork)-- There are few things parents love to hear more than the sound of their children laughing. However, in some cases it can be the sign of a serious medical problem. As CBS2's Dr.
Envision a warm, buoyant laugh that feels almost tangible, layered so that several girls can be heard sharing a private joke at once. The initial burst comes from a handful of high‑pitched ...
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