[1] Juntendo Shizuoka Hosp, Dept Cardiovasc Med, 1129 Nagaoka, Izunokuni City, Shizuoka 4102295, Japan
[2] Juntendo Univ, Cardiovasc Resp Sleep Med, Grad Sch Med, Tokyo, Japan
[3] Juntendo Univ Hosp, Sleep & Sleep Disordered Breathing Ctr, Tokyo, Japan
[4] Juntendo Univ, Dept Cardiovasc Biol & Med, Grad Sch Med, Bunkyo Ku, 3-1-3 Hongo, Tokyo, Japan