CORRELATION BETWEEN VITAMIN D LEVEL AND RESPONSE TO THERAPY IN PATIENTS WITH CHRONIC HEPATITIS C VIRAL INFECTION. STUDY OF SERUM INTERLEUKIN 17 LEVEL IN CHILDREN WITH BRONCHIAL ASTHMA. Response to Hepatitis B Vaccine in Egyptian Chronic Hepatitis C Patients Association of Insulin Growth Factor 2 Binding Protein 2 Gene rs4402960 Polymorphism with Type 2 Diabetes Mellitus in A Sample from Egyptian Patients THE EFFECT OF MESENCHYMAL STEM CELL DERIVED MICROVESICLES IN REPAIR OF FEMORAL CHONDRAL DEFECTS IN DOGS Heme oxygenase and iron status in exosomes of psoriasis patients ASSOCIATION BETWEEN PROTEIN TYROSINE PHOSPHATASE 1B GENE POLYMORPHISMS AND INSULIN RESISTANCE IN TYPE 2 DIABETES IN EGYPTIAN PATIENTS Impact of Vitamin D Supplementation on Attention-Deficit Hyperactivity Disorder in Children