Yildirir A, Aybar F, Kabakci MG, Yarali H, Akgul E, Bukulmez O, Tokgozoglu SL, Gurgan T, Oto A. Hormone replacement therapy shortens QT dispersion in healthy postmenopausal women. Ann Noninvasive Electrocardiol. 2001 Jul; 6(3):193-7.