Vaccine · 2012 · 89 citations · 17 references
MedicineChild HealthPediatricsAdolescent HealthImmunizationVaccinologyImmunization CareImmunization EducationPediatric ImmunizationVaccinationVaccine PolicyVaccine SafetyParental Acceptance Of VaccinationParental Vaccine AcceptanceParental Vaccine Decision-makingPediatric VaccinationVaccination Barriers
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How Many Interviews Are Enough?
Greg Guest, Arwen Bunce, Laura Johnson · Field Methods · 2005 · 19.4K citations