[1] Houston Methodist DeBakey Heart & Vasc Ctr, Dept Cardiol, Houston, TX 77030 USA
[2] Alexandria Univ, Dept Cardiol, Alexandria, Egypt
[3] Michigan State Univ, Dept Internal Med, E Lansing, MI 48824 USA
[4] Atlantic Hlth Syst, Morristown Med Ctr, Dept Internal Med, Morristown, NJ USA
[5] Alexandria Univ, Med Res Inst, Clin & Expt Internal Med Dept, Cardiol & Angiol Unit, Alexandria, Egypt
[6] Texas Tech Univ, Hlth Sci Ctr, Dept Internal Med, Lubbock, TX 79430 USA