Title: Be short, accurate, and unambiguous; Give your paper a distinct personality; Begin with the subject of the study.

Introduction:What is known; What is unknown; Why we did this study?

Methods:Participants, subjects; Measurements; Outcomes and explanatory variables; Statistical methods.

Results:Sample characteristics; Univariate analyses; Bivariate analyses; Multivariate analyses.

Tables and figures:No more than six tables or figures; Use Table 1 for sample characteristics (no P values); Put most important findings in a figure.