Gilani, Jaleed Ahmed, et al. “GRANULOMATOSIS WITH POLYANGIITIS: A 17 YEAR EXPERIENCE FROM A TERTIARY CARE HOSPITAL IN PAKISTAN”. Journal of Ayub Medical College Abbottabad, vol. 31, no. 3, July 2019, pp. 478-9, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/6167.