Year, Count, Co-author(s) 2001,5,"Heegaard, W.; Reardon, R.; Dries, David J., MD, MSE; Frascone, Ralph J., MD; Pippert, G." 2008,5,"Heegaard, W.; Dries, David J., MD, MSE; Salzman, J. G.; Frascone, Ralph J., MD; Pippert, G."