1. The Royal Australian College of General Practitioners aged care clinical guide (Silver Book)-Part B, Chapter-2. https://www.racgp.org.au/clinical-resources/clinical-guidelines/key-racgp-guidelines/view-all-racgp-guidelines/silver-book/silver-book-part-b/physiology-of-aging#:∼:text=Aging%20can%20be%20defined%20as,times%20of%20stress%20and%20illness; 2019.
2. Asian Working Group for Sarcopenia. Asian Working Group for Sarcopenia: 2019 Consensus update on sarcopenia diagnosis and treatment;Chen;J Am Med Dir Assoc,2020
3. Oropharyngeal swallowing in normal adults of different ages;Robbins;Gastroenterology,1992
4. Altered swallowing function in elderly patients without dysphagia: radiologic findings in 56 cases;Ekberg;AJR Am J Roentgenol,1991
5. Older Age Reduces Upper Esophageal Sphincter and Esophageal Body Responses to Simulated Slow and Ultraslow Reflux Events and Post-Reflux Residue;Mei;Gastroenterology,2018