Migraine DisordersMigraine without AuraTension-Type HeadacheSeverity of Illness IndexHand, Foot and Mouth DiseaseHeadacheErgotamineMigraine with AuraMotion SicknessHeadache DisordersAngiostrongylus cantonensisInfluenza, HumanInfluenza A Virus, H1N1 SubtypeHeadache Disorders, PrimarySnake BitesTinnitusTreatment OutcomePhotoplethysmographyEnterovirus A, HumanDengueFacial PainPandemicsPrevalenceLeptospirosisDengue VirusDisease OutbreaksSevere DengueQuestionnairesCase-Control StudiesRisk FactorsAcute DiseaseTime FactorsInfant, NewbornHospitalizationPainRetrospective StudiesSeasonsPancreatitisSleep Initiation and Maintenance DisordersAnalgesicsChinaBrazilIrritable Bowel SyndromeRhinitis, Allergic, SeasonalFatal OutcomeChronic DiseaseAttitude to HealthAntiviral AgentsLow Back PainIncidenceQuality of LifeAdrenal Cortex HormonesPain MeasurementPregnancySleep DisordersProspective StudiesPatient Acceptance of Health CarePatient SatisfactionCost of IllnessFollow-Up StudiesDisability EvaluationStress, PsychologicalAnti-Bacterial AgentsCross-Sectional StudiesActivities of Daily LivingHealth SurveysAge FactorsPrognosisPopulation SurveillanceGreat BritainAntibodies, ViralComorbidityPatient Education as TopicSensitivity and SpecificityMutationGenotypeDepressionMagnetic Resonance ImagingEnglandPredictive Value of TestsSex FactorsPostoperative ComplicationsTomography, X-Ray ComputedDisease Models, AnimalOutcome Assessment (Health Care)PhenotypeMolecular Sequence DataCohort Studies