Pohplook, J., Puwarawuttipanich, W., Koositamongkol, S. and Rongrungruang , Y. (2021) “Factors Influencing Severity and Impact of Symptoms in Patients with Upper Respiratory Tract Infection at Community Hospitals and Health-Promoting Hospitals”, Siriraj Medical Journal, 73(8), pp. 510–517. doi: 10.33192/Smj.2021.66.