Received: 11 June 2018
Accepted: 7 September 2018
First Online: 15 September 2018
Ethics approval and consent to participate
: All human samples were obtained with informed consent. The protocols were approved by the ethical review committee of the World Health Organization Collaborating Center for Research in Human Production (authorized by the Shanghai Municipal Government). All animals received humane care according to the criteria outlined in the “Guide for the Care and Use of Laboratory Animals” prepared by the National Academy of Sciences and published by the National Institutes of Health.
: We have obtained consent to publish from the participant to report individual patient data.
: The authors declare that they have no competing interests.
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