The Collapsing Variant of Focal Segmental Glomerulosclerosis (FSGS) Secondary to Sarcoidosis, A Very Rare Case. IJKD [Internet]. 2021 Jan. 21 [cited 2024 Dec. 22];15(1):64-8. Available from: https://ijkd.org/index.php/ijkd/article/view/5734