1. Institute of Geriatric CardiologyChinese People's Liberation Army General HospitalBeijingChina
2. Department of Geriatric HematologyChinese People's Liberation Army General HospitalBeijingChina
3. Department of Clinical Laboratory MedicineChinese People's Liberation Army General HospitalBeijingChina
4. Changhai HospitalSecond Military Medical UniversityShanghaiChina
5. Department of OsteologyChinese People's Liberation Army General HospitalBeijingChina