Changes

<ref name="Williams-2012">{{Cite journal | last1 = Williams | first1 = PT. | title = Williams, Non-Exchangeability of Running vs. Other Exercise in Their Association with Adiposity, and Its Implications for Public Health Recommendations. | journal = , PLoS One | , volume = 7 | , issue = 7 | , pages = e36360 | month = , | year = 2012 | , doi = [http://dx.doi.org/10.1371/journal.pone.0036360 | 10.1371/journal.pone.0036360], PMID = [http://www.ncbi.nlm.nih.gov/pubmed/22808000 22808000 }}]</ref>