Wahla, Wahla AS, et al. “RETROSPECTIVE LOOK AT CHANGE IN BRAIN NATRIURETIC PEPTIDE VALUES IN AMBULATORY PATIENTS WITH CHRONIC HEART FAILURE”. Journal of Ayub Medical College Abbottabad, vol. 24, no. 2, June 2012, pp. 3-6, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/2177.