Shrestha, Bidhan, et al. “Prevalence of Vitamin D Deficiency in Patients Attending Outpatient Clinic With Thyroid Disorders in Chitwan Medical College Teaching Hospital”. Journal of Chitwan Medical College, vol. 7, no. 2, June 2017, pp. 7-10, https://doi.org/10.3126/jcmc.v7i2.22925.