References and citations should be marked with superscript in the text, and numbered in the reference section according to theVancouverstyle. If the reference has more than one author, all authors’ names should be listed. However, if there are more than six authors, only six names are required, and the rest of them are to be represented by et al. Names of journals should be abbreviated according to Index Medicus. Page number must be included. Titles in other languages should be translated to English where possible.