비타민d가 결핍되면 백혈병에 걸릴 확률이 2배 증가한다! 햇볕을 꼭 쬐야하는 이유! / Ytn 웨더앤라이프

2017 2:11
Synopsis
[YTN 웨더 기사원문] http://ytnweather.co.kr/program/program_view.php?key=201604291024267929.
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