Vaccine. 2007 Aug 1;25(31):5875-81. Epub 2007 May 8.
Hypotonic-hyporesponsive episode (HHE) as an adverse event following immunization in early childhood: case definition and guidelines for data collection, analysis, and presentation.
Buettcher M, Heininger U, Braun M, Bonhoeffer J, Halperin S, Heijbel H, de Menezes Martins R, Vermeer-de Bondt P; Brighton Collaboration HHE Working Group.
University Children's Hospital, Basel, Switzerland.
PMID: 17537554 [PubMed]