Also known as: Premature; Infant / Premature Babies / Premature baby / Prematurity / Infant Premature / Infant,Premature / Premature Infant / Infant, Premature / Premature Infants / Prematurity of infant (disorder) / Maturity of baby (& [full term] or [postmature] or [premature]) / Baby premature / Premature infant (finding) / Immature baby / (Very premature - less than 1000g or less than 28 weeks) or (immature baby) / (Short gestation and unspecified low birthweight problems) or (baby born premature) / Preterm infant / 28 completed weeks or more but less than 37 completed weeks (196 completed days but less than 259 completed days) of gestation.