Incubators.
D001831:Body Temperature; D001833:Body Temperature Regulation; D001834:Body Water / Q000378:metabolism; D006801:Humans; D007035:Hypothermia / Q000517:prevention & control; D007186:Incubators, Infant / Q000592:standards; D007230:Infant, Low Birth Weight / Q000502:physiology; D007231:Infant, Newborn / Q000502:physiology; D012449:Safety