A rectangular Wilson loop centered at the origin, with sides parallel to space and time directions and length 2L and 2T respectively, is perturbatively evaluated O(g4) in Feynman gauge for Yang–Mills theory in 1+(D−1) dimensions. When D > 2, there is a dependence on the dimensionless ratio L/T , besides the area. In the limit T → ∞, keeping D > 2, the leading expression of the loop involves onl...

BACKGROUND Extra-oesophageal symptoms are thought to be common, atypical symptoms of gastro-oesophageal reflux disease (GERD) in children. AIM To investigate the prevalence of GERD in children with extra-oesophageal symptoms or of extra-oesophageal symptoms in children with GERD, and the effect of GERD therapies on extra-oesophageal symptoms. METHODS A systematic review of articles in PubMe...

A previously healthy 5-weekold boy who was born at term is brought to the emergency department. His mother reports that she had placed him on his side with a support pillow after breast-feeding him before she went to take a shower. Upon returning to check on him, she found him in prone position, with his nose and mouth in the mattress, “struggling” to breathe; his face was red. The mother thoug...

Based on strong research evidence, the most common causes of apparent life-threatening events (ALTEs) are gastroesophageal reflux, lower respiratory tract infection, and seizure. • The minimum initial diagnostic panel for ALTE should include complete blood cell (CBC) count with differential; blood levels of C-reactive protein,glucose, sodium, potassium, urea, calcium,magnesium, ammonia, lactate...