title: [How meaningful is the aspiration of injection solution after inserting the injection needle for the intramuscular administration of vaccines?].
authors.forename: K
authors.initials: K
authors.lastname: Knol
mesh_terms: D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007273:Injections, Intramuscular / Q000379:methods*; D013594:Syringes; D014612:Vaccines / Q000008:administration & dosage*
chemical_list: D014612:Vaccines