สฤกพฤกษ์ เปี่ยมสุข. 2023. “Factor Predicted Symptomatic COVID-19 Infection and COVID-19 Pneumonia in Thungsong Hospital, Nakhon Si Thammarat Province”. Journal of Health Science of Thailand 32 (6):1056-65. https://thaidj.org/index.php/JHS/article/view/14905.