Use of simple anthropometric measurements to predict newborn infants at risk for early postnatal morbidity. In Med J Cairo Univ; 63:3137.1995. Childhood asthma and passive smoking. In Egypt J Pediat;12:291- 304,1995. Prevalence and epidemiology of Campylobacter jejuni and coli in diarrhea. In Egypt J Pediat; 13:257-72, 1996 Erythropoietin, hypoxanthine and lactate levels in newborns with meconium – stained amniotic fluid. In J Arab Child; 8:499-504 Antioxidant status in preterm infants in health and disease and its relation to vitamin “C” concentration at birth. In Benha Med J, 14:269-81 Effect of vitamin A supplementation on seroconversion to measles vaccination. In Gaz Egypt Pediat; 46:135-44 Nitric oxide and endotoxemia in children with liver cirrhosis. In Al Azhar J Pediat; 2, Serum creatin kinase level and its isoenzymes as a marker in neonatal sepsis. In J Arab Child; 4 Endoscopic and serologic studies in children with recurrent abdominal pain. In J Arab Child 10 (4):639-47, Skeletal maturation and serum osteocalcin level in patients with juvenile rheumatoid arthritis. In Zagazig University Med J; VIII (7):1169-84, Study of the relation between iron deficiency anemia and Heliobacter Pylori in children. In Al Azhar J Pediat;(7):69-76, The role of serum hyaluronic acid as a marker of hepatic fibroses in chronic liver disease. In Egypian J Pediat; 21(3&4):465-75, Platelet aggregation test and IgM as a predictor of inflammation and response to erythropoietin therapy in hemodialysis children. In 6th Annual congress of the Egyptian society of pediatric Nephrology and Transplantation Relation between circulating Monocyte Chemoattractant Protein-1 and early development of nephropathy in type 1 diabetes in children and adolescents. In Benha Med J; 21,(3):429-444, Transcutaneous bilirubinometry in preterm and fullterm infants under phototherapy. In In Benha Med J; 21,(3):417-427, Granulocyte colony stimulating factor as an early marker for bacterial infection in neonates. In Scientific Med J; 17(1):57-68, Oxidative stress markers in children with chronic renal failure. In Egyptian J Pediat; 22(2&3):223-240, TEL gene rearrangement in childhood ALL and its prognostic value in Egyptian children. In Egypian J Pediat; 22(2&3):241-255, Assessment of dialysis adequacy and nutritional status in the pediatric hemodialysis patients. In Sixth Congress of the Egyptian Society of Pediatric Nephrology and Transplantation, Role of procalcitonin in evaluation of urinary tract in children. In J Egyp Soc Pediat Neph & Transp, ENDOSCOPIC AND SEROLOGIC STUDIES IN CHILDREN WITH RECURRENT ABDOMINAL PAIN Gamal