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In recent years, the role of serotonin in the pathophysiology of depressive disorders has been intensively studied. These studies have been complemented by the development of newer antidepressant agents that exert specific effects on serotonin systems. This paper reviews the pharmacology of these newer compounds and contrasts it with those of the standard(More)
A new proof of Menger's theorem is presented. The purpose of this note is to give a new proof of a classical theorem of Menger [8], which has as corollaries theorems of Hall [5], Konig [7] and Dilworth [2]. Variations of Dirac's proof [ 3 ] appear in [6] and [l], and another proof is sketched in [lo]. A proof based on the max-flow, min-cut theorem appears(More)
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