1. Department of Geriatrics, Affiliated Hospital of Traditional Chinese Medicine of Southwest Medical University, Luzhou, Sichuan, China (mainland)
2. Department of Ultrasound Imaging, Affiliated Hospital of Traditional Chinese Medicine of Southwest Medical University, Luzhou, Sichuan, China (mainland)
3. Department of Geriatric Cognitive Disorder Ward, Fourth People’s Hospital of Urumqi, Urumqi, Xinjiang, China (mainland)
4. Department of Preventive Treatment Centre, Affiliated Hospital of Traditional Chinese Medicine of Southwest Medical University, Luzhou, Sichuan, China (mainland)