Phengkaew, Thanaporn, and Atapol Sughondhabirom. “Prevalence of vitamin D deficiency in patients with schizophrenia at King Chulalongkorn Memorial Hospital”. Chulalongkorn Medical Journal 64, no. 2 (April 1, 2020). accessed April 8, 2025. https://he05.tci-thaijo.org/index.php/CMJ/article/view/193.