Hayes AF, Rockwood NJ. Regression-based statistical mediation and moderation analysis in clinical research: observations, recommendations, and implementation. Behav Res Ther. 2017 Nov;98:39-57. doi: 10.1016/j.brat.2016.11.001
Wallner (MacLeod) S, Kendall P, Hillers V, Bradshaw E, Medeiros LC. Online continuing education course enhances nutrition and health professionals' knowledge of food safety issues of high-risk populations. J Am Diet Assoc. 2007 Aug;107(8):1333-8. doi: 10.1016/j.jada.2007.05.014