Funding for this research was provided by:
Science and Technology Project of Anshun Tobacco Company (201712)
Science and Technology Project of Zunyi Tobacco Company (2018-02)
Science and Technology project of Shanghai Tobacco Group Co. LTD (K2016-1-018Z)
Article History
Received: 1 September 2020
Accepted: 6 January 2021
First Online: 1 February 2021
Competing interest
: The authors declare that they have no conflict of interest.
: Not applicable.
: Not applicable.