Insisto... insisto... e insisto...
http://www.faiam.org.ar/queesmiastenia.htm
http://www.miasteniagravis.net/ARTICULOS/Documento2.pdf.
http://www.shands.org/health/Spanish%20Health%20Illustrated%20Encyclopedia/5/000161.htm
http://www.conarec.org.ar/revista/1/nodo_sinusal.pdf.