Study of the level of stem cell factor in patients with bronchial asthma Does Wide Pore Drain Still have a Role in Drainage of Free Malignant Pleural Effusion? Pulse transit time in patients with sleep-disordered breathing Assessment of serum electrolytes (sodium, potassium, and ionized calcium) during chronic obstructive pulmonary disease exacerbation Prognostic value of platelet and neutrophil to lymphocyte ratio in COPD patients Assessment of the participation of primary care services in national tuberculosis control program in El Behaira Governorate Diagnostic role of interleukin -33 in the differentiation of pleural effusions especially tuberculous and malignant effusions Comparative Study of Virtual Versus Conventional Bronchoscopies as Assistive Diagnostic Tools for the Thoracic Surgeons The Role of Ultrasound in Assessment of Diaphragmatic Dysfunction in I.C.U Patients S EAR CH Open Access Effect of acute kidney injury on weaning from mechanical ventilation in chronic obstructive pulmonary diseases patients with respiratory failure Effect of acute kidney injury on weaning from mechanical ventilation in chronic obstructive pulmonary diseases patients with respiratory failure Diagnostic value of calprotectin in differentiation between benign and malignant pleural effusion