Copyright

摘要

Submission of a manuscript or translation of an article previously published in the Chinese language implies that this article has not been published in the English language or any other foreign language before; that a translation of this article is not under consideration for publication elsewhere; that the publication of the translated article has been approved by all co-authors, if any, as well as- tacitly or explicitly by the responsible authorities at the institution where the work was carried out. The author warrants that his/her contribution is original and that he/she has full power to make this grant.