First- time use of plasma exchange for atypical hemolytic uremic syndrome in a 5-year-old child in a low-middle-income country: a case report. Bhutan Health Journal [Internet]. 2026 Jun. 19 [cited 2026 Jul. 1];12(2):5. Available from: https://www.bhj.com.bt/index.php/bhj/article/view/589