1. Department of Rehabilitation Medicine, National Hospital Organization, Nagoya Medical Center, Nagoya, Aichi, Japan
2. Department of Critical Care Medicine, National Hospital Organization, Nagoya Medical Center, Nagoya, Aichi, Japan
3. Critical Care Research Group, The Prince Charles Hospital, Chermside, Australia
4. Department of Physical Therapy, School of Health Science, Toyohashi Sozo University, Toyohashi, Aichi, Japan