“I accustomed to encounter many stiffness in my knees resulting from osteoarthritis. I wouldn’t have the capacity to get up after sitting down for long. But at any time due to the fact JointLab came into my life, I'm able to do things that I wasn’t ready to do before.?ây c?ng ??u là nh?ng d??ng ch?t c?u t?o nên nhân nh?y và bao x? c?a ??