In accordance with GB/T 7714—2005 Rules for Content, Form and Structure of Bibliographic References, references are to be cited in numerical order in the text and identified by Arabic numerals set in superscript type. In text and reference list, the sequence number should also be put in middle brackets. If authors of the reference are within 3 persons, list the names of them all; if authors of the reference exceed 3 persons, list the name of the first three authors, and add “et al” to represent the other authors. The surname should be placed before the name, and the name of foreigners should adopt acronyms, which are not followed by the abbreviation punctuation. The name of different authors should be separated by commas. The titles of Chinese journals should adopt the full name, while the titles of foreign journals should be abbreviated according to Index Medicus. The authors must ensure that the references are cited correctly in line with the original text.