1. Jinan People’ s Hospital Affiliated to Shandong First Medical University, Laiwu, Shandong Province, China
2. Department of Critical Care Medicine, Penglai Hospital of Traditional Chinese Medicine, Penglai, Shandong Province, China
3. Penglai Hospital of Traditional Chinese Medicine, Penglai, Shandong Province, China
4. Department of Senile Diseases, Dongying City Shengli Hospital, Dongying, Shandong Province, China