1 Department of General Medicine, Royal Children's Hospital, Melbourne, Australia; SAEFVIC (Surveillance of Adverse Events Following Vaccination in the Community), Murdoch Children's Research Institute, Melbourne, Australia. Electronic address: rowena.silcock@rch.org.au.
2 Department of Anatomical Pathology, The Royal Children's Hospital, Melbourne, Australia; Department of Paediatrics, Monash University, Clayton, Australia. Electronic address: ali.moghimi@health.nsw.gov.au.
3 Population Allergy Research Group and Melbourne Children's Trial Centre, Murdoch Children's Research Institute, Melbourne, Australia; Department of Allergy and Immunology and General Medicine, Royal Children's Hospital, Melbourne, Australia; Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia. Electronic address: kirsten.perrett@rch.org.au.
4 Department of General Medicine, Royal Children's Hospital, Melbourne, Australia; SAEFVIC (Surveillance of Adverse Events Following Vaccination in the Community), Murdoch Children's Research Institute, Melbourne, Australia. Electronic address: nigel.crawford@mcri.edu.au.