WalesNew South WalesEnglandGerminal CenterChild Day Care CentersCommunity Health CentersTrauma CentersTertiary Care CentersGreat BritainCenters for Disease Control and Prevention (U.S.)Retrospective StudiesInfant, NewbornPoison Control CentersIncidencePhotosynthetic Reaction Center Complex ProteinsAge FactorsTime FactorsInformation CentersRisk FactorsNorthern Ireland