Sjahrir, M., I. D. Roesyanto-Mahadi, and E. Effendy. “Correlation Between Serum Brain-Derived Neurotrophic Factor Level and Depression Severity in Psoriasis Vulgaris Patients”. Open Access Macedonian Journal of Medical Sciences, vol. 7, no. 4, Feb. 2019, pp. 583-6, doi:10.3889/oamjms.2019.142.