Authors: Steven Black; Juhani Eskola; Claire-Anne Siegrist; Neal Halsey; Noni MacDonald; Barbara Law; Elizabeth Miller; Nick Andrews; Julia Stowe; Daniel Salmon; Kirsten Vannice; Hector S Izurieta; Aysha Akhtar; Mike Gold; Gabriel Oselka; Patrick Zuber; Dina Pfeifer; Claudia Vellozzi Journal: Lancet Date: 2009-10-31 Impact factor: 79.321