Additional file 1.

Electronic search for the intervention studies including: database, number of references found, and terms included. The electronic search performed to identify the studies for this review is provided in detail. The terms used to search in the five different databases used (PubMed, Web of Science, Cochrane Library, SPORT Discus and the National Transportation Library) are included. Moreover, the number of final references found in each database was likewise mentioned.

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Chill√≥n et al. International Journal of Behavioral Nutrition and Physical Activity 2011 8:10   doi:10.1186/1479-5868-8-10