The sleep patterns of preschool children. General principles and current knowledge.
D000367:Age Factors; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007360:Intelligence; D008297:Male; D012737:Sex Factors; D012890:Sleep; D012894:Sleep Stages; D013997:Time Factors