<qa>  What is the mean resting corrected QT interval calculated using Fridericias formula- Mean resting corrected QT interval QTc, calculated using Fridericias formula, 470 msec obtained from 3 electrocardiograms ECGs, family or personal history of long or short QT syndrome, Brugada syndrome or known history of QTc prolongation or Torsade de Pointes within 12 months of the patient entering in the study 