Ketchai, S., Sitthimongkol, Y., Vongsirimas, N. and Petrasuwan, S. (2012) “Predictors of Depressive Symptoms in Individual with First–episode Schizophrenia”, Nursing Science Journal of Thailand, 30(4), pp. 90–101. available at: https://he02.tci-thaijo.org/index.php/ns/article/view/10546 (accessed: 21 September 2026).