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n engl j med 367;10 nejm.org september 6, 2012 954 approved August 1
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CONTENTS I. Introduction: Short and long range interactions 843 II. Spontaneous Symmetry Breaking 844 A. Spontaneous symmetry breaking in phase transitions 844 B. Spontaneous symmetry breaking in field theory 845 III. The BEH Mechanism 846 A. The fate of the Nambu-Goldstone boson and vector boson masses 846 B. The fate of the massive scalar boson 847 C. Fermion masses 848 D. Why is the mechanis...
BACKGROUND Methylxanthines reduce the frequency of apnea of prematurity and the need for mechanical ventilation during the first seven days of therapy. It is uncertain whether methylxanthines have other short- and long-term benefits or risks in infants with very low birth weight. METHODS We randomly assigned 2006 infants with birth weights of 500 to 1250 g during the first 10 days of life to ...
*Ricardo Carmona1, Servando Espejo1, Rafael Domínguez-Castro1, Ángel RodríguezVázquez1, Tamás Roska2, Tibor Kozek3, Leon O. Chua3 1 Instituto de Microelectrónica de Sevilla-CNM-CSIC-Universidad de Sevilla. Edificio CICA, Avda. Reina Mercedes s/n, 41012-Sevilla, Spain. Ph. No.: 34+ 954 239923, Fax: 34+ 954 231832 E-mail: [email protected] 2 MTA-SZTAKI, Analogic & Neural Computing Laboratory, ...
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