[Babies in hardiness test].
D005060:Europe; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans; D007223:Infant; D007224:Infant Care / Q000266:history*; D007231:Infant, Newborn; D008512:Medicine in the Arts; D008519:Medicine, Traditional / Q000266:history*; D017283:Neonatal Nursing / Q000266:history*; D010151:Paintings / Q000266:history*