DenmarkScandinaviaGreenlandMedical History TakingRisk FactorsRegistriesHistory, 20th CenturyIncidenceEuropeHistory, 19th CenturyCohort StudiesSwedenHistory of MedicineHistory, 17th CenturyHistory, 18th CenturyInfant, NewbornAge FactorsHistory, AncientPrevalenceCase-Control StudiesHistoryHistory, 21st CenturyHistory, MedievalNorwayTime FactorsFollow-Up StudiesQuestionnairesSex FactorsFinlandHistory, 16th CenturyProspective StudiesLegislation, VeterinaryPhylogenyPregnancyRisk AssessmentRetrospective StudiesPoisson DistributionOdds RatioLogistic ModelsCross-Sectional StudiesAge DistributionIcelandOccupational DiseasesFamily HealthHaresHistory, 15th Century