%0 Case Reports %T Electrophysiological study in synaptic congenital myasthenic syndrome: end-plate acetylcholinesterase deficiency. %A Lorenzoni PJ %A Scola RH %A Gervini BL %A Kay CS %A Werneck LC %J Arq Neuropsiquiatr %V 67 %N 2 %D Jun 2009 %M 19623452 %F 2.035 %R 10.1590/s0004-282x2009000300024 %X