Department of Internal Medicine, International University of Health and Welfare, Shioya Hospital, Yaita, Japan;
Department of Respiratory Medicine, National Center for Child Health and Development, Tokyo, Japan;
Division of Internal Medicine, Murayama Medical Center, Musashimurayama, Japan;
Division of Respiratory Medicine, Department of Medicine, Tokai University School of Medicine, Isehara, Japan;
Hyperventilation; Bicarbonate; Bland-Altman; Analysis; Venous; Blood; Gas; Analysis;