Author's reply.
Division of Cardiology, National Center for Child Health and Development, Tokyo, Japan. Electronic address: taiyuhayashi@gmail.com.
Taiyu
T
Hayashi
Department of Cardiovascular Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Keiichi
K
Itatani
D000367:Age Factors; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D016277:Ventricular Function, Left / Q000502:physiology*