Syahdema MF, Siregar MF, Nasution HH, Prabudi MO, Marpaung J, Sukatendel K. Effects of vitamin D supplementation on salivary cortisol and psychological health among postmenopausal women: A pilot quasi-experimental study. Narra X [Internet]. 2025 Sep. 11 [cited 2026 May 7];3(2):e224. Available from: https://www.narrax.org/main/article/view/224