Vitamin D Deficiency in Infertile Males with Oligospermia: A Cross-sectional Comparative Study. J. Bangladesh Coll. Phys. [Internet]. 2022 Oct. 16 [cited 2026 Jul. 3];40(4):253-6. Available from: https://www.banglajol.info/index.php/JBCPS/article/view/61877