PubMed/MEDLINE and ISI/Web of Science electronic searches of articles were conducted using the following keywords: psychological, depression, stress, anxiety, behavior, MS, syndrome x, central adiposity/obesity, visceral adiposity/obesity, waist circumference and insulin resistance/sensitivity. Original and review papers published since the year 2005 were selected. A further manual selection was then performed to verify the use of adequate research methods in the included studies. When more than one article presented similar information, the most recent one was retained to provide state-of-the-art information. Other relevant references cited in the selected papers that were not found by our primary search were also included.
Expert Rev Endocrinol Metab. 2012;7(1):63-71. © 2012 Expert Reviews Ltd.