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3. World Health Organisation, 〈http://apps.who.int/gho/data/view.main.690?lang=en〉.
4. Office for National Statistics, 〈http://www.ons.gov.uk/ons/rel/lifetables/national-life-tables/2011-2013/stb-uk-2011-2013.html〉.
5. BMI independently predicts younger age at hip and knee replacement;Gandhi;Obesity (Silver Spring),2010