Yang, Zhen
Wang, Xiang-ling
Bai, Ru
Liu, Wei-ying
Li, Xin
Liu, Min
Tang, Hua
Article History
Received: 18 June 2016
Revised: 7 July 2016
Accepted: 12 July 2016
First Online: 18 August 2016
Change Date: 6 September 2016
Change Type: Update
Change Details: This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication
Change Date: 26 June 2023
Change Type: Correction
Change Details: This article has been retracted. Please see the Retraction Notice for more detail:
Change Details: https://doi.org/10.1038/s41416-023-02328-5
Competing interests
: The authors declare no conflict of interest.