title: Hypotonic-hyporesponsive episode (HHE) as an adverse event following immunization in early childhood: case definition and guidelines for data collection, analysis, and presentation.
authors.affiliation: University Children's Hospital, Basel, Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Buettcher
authors.forename: Ulrich
authors.initials: U
authors.lastname: Heininger
authors.forename: Miles
authors.initials: M
authors.lastname: Braun
authors.forename: Jan
authors.initials: J
authors.lastname: Bonhoeffer
authors.forename: Scott
authors.initials: S
authors.lastname: Halperin
authors.forename: Harald
authors.initials: H
authors.lastname: Heijbel
authors.forename: Reinaldo
authors.initials: R
authors.lastname: de Menezes Martins
authors.forename: Patricia
authors.initials: P
authors.lastname: Vermeer-de Bondt