ETHICAL APPROVAL
The authors confirm that the ethical policies of the journal, as noted
on the journal’s author guidelines page, have been adhered to. All
animal experiments were approved by the Jiangsu Administrative Committee
for Laboratory Animals (Permission number: SYXK-SU-2007-0005), and
complied with the guidelines of Jiangsu laboratory animal welfare and
ethics of Jiangsu Administrative Committee of Laboratory Animals.
Experiments involving live H7N9 viruses were performed in animal
biosafety level-3 facilities, which were approved by the Ministry of
Agriculture and Rural Affairs of the People’s Republic of China.