“The Effects of 10,000 IU Vitamin D Supplementation on Improvement of Clinical Outcomes, Inflammatory and Coagulation Markers in Moderate COVID-19 Patients: A Randomized-Controlled Trial”. Nutrición Clínica y Dietética Hospitalaria 43, no. 2 (May 1, 2023). Accessed April 22, 2025. https://revista.nutricion.org/index.php/ncdh/article/view/345.