The research, which is published online by the British Medical Journal (BMJ), was led by Robert of the National Centre for Immunisation Research and Surveillance in Sydney, Australia.

• 这项研究由澳大利亚悉尼国家免疫研究及监视中心专家罗伯特负责，并发表在最近出版的《英国医学杂志》在线版上。