Study of serum Granzyme B in heavy cigarette smokers with and without chronic obstructive pulmonary disease Study of serum Granzyme B in heavy cigarette smokers with and without chronic obstructive pulmonary disease Evaluation of serum troponin I in patients with acute exacerbations of chronic obstructive pulmonary disease Improvement of exercise performance and ventilatory efficiency in patients with chronic heart failure after sildenafil use for 8 weeks Role of Interleukin -6 (IL6) in Diagnosis of Malignant Pleural Mesothelioma Study of Effect of Inhaled Versus Oral Corticosteroids on Sputum Granzyme B in Patients with Moderate Persistent Bronchial Asthma Study of 2-min walk test and 15-step exercise oximetry test in the assessment of exercise tolerance in Egyptian patients with chronic obstructive pulmonary disease Study of 2-min walk test and 15-step exercise oximetry test in the assessment of exercise tolerance in Egyptian patients with chronic obstructive pulmonary disease STUDY OF SOME PULOMNARY ALTERATIONS IN PATIENTS WITH CHRONIC HEPATITIS C VIRUS INFECTION Radiopaque Foreign Bodies Inhalation in Children and Adolescents Polymorphism of Toll like Receptors 2 & 4 Genes and the Risk of Bronchial Asthma Surface Expression and Genetic Variants of Toll-like Receptor 2 in Pulmonary Tuberculosis Patients Evaluation of role of computed tomography (CT) in the diagnosis of pulmonary hypertension Assessment of the prevalence of depression in chronic obstructive pulmonary disease patients Study of plasma copeptin level as a prognostic marker in respiratory failure patients admitted in the ICU at Benha University Hospital The role of medical thoracoscopy in the management of empyema The role of medical thoracoscopic lung biopsy in diagnosis of diffuse parenchymal lung diseases Ventilator-Associated Pneumonia: The Effect of Bacterial Resistance