Funding for this research was provided by:
Deutsche Krebshilfe (110836)
China Scholarship Council (201608080054)
Received: 17 September 2018
Accepted: 14 November 2018
First Online: 12 December 2018
: Animal experiments were approved by the Government of Baden-Wuerttemberg, Germany and were carried out in accordance withExternalRef removed.
: Not applicable.
: The authors declare that they have no competing interests.
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