All papers should be double-spaced throughout, and each section (title page, abstract, text, references, tables, figures, figure captions) should begin on a new page. Research articles should be divided into Abstract, Introduction, Methods, Results, Discussion, Limitations and Conclusion sections. In studies where the entire population is of the same sex, the sex should be specified in the title. Please write in the active, rather than the passive voice; papers written in the passive voice will be converted to the active voice where necessary during copyediting. Please keep abbreviations to a minimum: abbreviate only widely-recognized terms (e.g., MRI, SD) and terms that are used extensively in the manuscript.