Malcolm von Schantz, wigisha isomo rijyanye no kujya ibihe kw'ibice bitandukanye mu mikorere y'umubiri (chronobiology) kuri Kaminuza ya Surrey mu Bwongereza, yongeyeho ati: "Nubwo ntekereza ko buri wese ubishoboye akwiye guharanira kugira ingengabihe ihoraho, sintekereza ko dukwiye kubwira abantu badashoboye ibyo ko batagomba kuryamira mu mpera y'icyumweru".
