Hip, knee and other joint replacement procedures are among the most common elective surgeries in the United States.
원문출처 : https://www.cnn.com/2018/03/06/health/hip-knee-replacement-surgeries-earlier-study/index.html
원문출처 : https://www.cnn.com/2018/03/06/health/hip-knee-replacement-surgeries-earlier-study/index.html