ROLE OF SCORING SYSTEMS AS A PROGNOSTIC FACTOR IN PATIENTS ADMITTED IN ICU WITH COPD AND RESPIRATORY FAILURE, Yousry El-Saied Rizk, Tarek Samy Essawy, Basem Mofreh Aglan, Usama Abdelhay Afifi, INTERNATIONAL JOURNAL OF PURE MEDICAL RESEARCH : Volume-4 | Issue-10 | October-2019