LETTER TO THE EDITOR |
Theo P. Sloots, PhD
Michael D. Nissen, FRACP
Queensland Paediatric Infectious Diseases Laboratory
Royal Children's Hospital
Brisbane, Queensland, Australia 4029
Terry M. Nolan, PhD
Vaccine and Immunisation Research Group
University of Melbourne and the Murdoch Children's Research Institute
Melbourne, Victoria, Australia 3010
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In Reply.—
We thank Pilger and Cantarelli for their comments on our article. We agree that, as with all observational studies, ours had potential bias