Iqbal N, Shah SK, Haneef S. Polycythemia vera is a medical condition characterized by raised hematocrit. Owing to increased viscosity, the blood flow in the vessels become sluggish leading to the clinical features of polycythemia such as headache, blurring of vision, red skin, dizzi. J. Bahria Univ. Med. Dent. Coll. [Internet]. 2021 Mar. 18 [cited 2024 May 19];10(2):163-5. Available from: https://jbumdc.bahria.edu.pk/index.php/ojs/article/view/448