1. Department of GeriatricsAffiliated Hospital of Qingdao UniversityQingdaoChina
2. Department of General MedicineFirst Affiliated Hospital of Xinxiang Medical UniversityXinxiangChina
3. Department of Physiology and PathophysiologyCollege of MedicineQingdao UniversityQingdaoChina
4. Department of PathologyQingdao Municipal HospitalQingdaoChina
5. Department of CardiologyAffiliated Cardiovascular Hospital of Qingdao UniversityQingdaoChina
6. Department of Human AnatomyHistology and EmbryologyCollege of MedicineQingdao UniversityQingdaoChina