Bibi Sarah Pandhiani, Riaz Hussain Shah, Khalil Ahmed Sanghro, Bakht Ali Siyal, Gordhan, Aijaz Ahmed Laghari. 2021. “Levels of Serum Vitamin D Among Patients of Chronic Obstructive Pulmonary Disease and Its Association With Severity: A Case Control Study”. Annals of the Romanian Society for Cell Biology 25 (7):1837-45. https://annalsofrscb.ro/index.php/journal/article/view/10654.