What can you do to prepare for safe holiday road trips this year? Try getting the recommended seven to eight hours of sleep each night.
원문출처 : http://www.cnn.com/2016/12/06/health/sleep-driving-crash-risk/index.html
원문출처 : http://www.cnn.com/2016/12/06/health/sleep-driving-crash-risk/index.html