Received May 23, 2014; accepted August 6, 2014; released online September 11, 2014 Time for primary review: 14 days Division of Cardiovascular Medicine, Saitama Medical Center, Jichi Medical University, Saitama, Japan Mailing address: Yasushi Wakabayashi, MD, Division of Cardiovascular Medicine, Saitama Medical Center, Jichi Medical University, 1-847 Amanuma, Omiya-ku, Saitama 330-8503, Japan. ...