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Article History
Received: 15 September 2021
Accepted: 27 October 2021
First Online: 31 October 2021
Declarations
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: The authors are accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. The study was conducted in accordance with the Declaration of Helsinki (as revised in 2013). The study was approved by the independent medical ethical committee of the Peking Union medical College and all the patients signed extensive informed consents.
: Not applicable.
: Not applicable.
