1. Department of Autonomic Neuroscience, Tokyo Metropolitan Institute of Gerontology, 35–2 Sakaecho, Itabashi-ku, Tokyo 173-0015, Japan
2. Department of Chiropractic, Université du Québec à Trois-Rivières, 3351 Boul. Des Forges, C.P 500, Trois-Rivières, Québec G9A 5H7, Canada