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BMI classification. Copyright 2006. <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/apps.who.int\/bmi\/index.jsp?introPage=intro_3.html\" xlink:type=\"simple\">http:\/\/apps.who.int\/bmi\/index.jsp?introPage=intro_3.html<\/ext-link> [accessed 5 March 2018]."},{"issue":"2","key":"ref43","doi-asserted-by":"crossref","first-page":"469","DOI":"10.2466\/10.25.26.PMS.114.2.469-478","article-title":"Gait speed measure: the effect of different measuring distances and the inclusion and exclusion of acceleration and deceleration","volume":"114","author":"CY Wang","year":"2012","journal-title":"Percept Mot Skills"},{"key":"ref44","article-title":"Grip Strength","author":"EE Fess","year":"1992"},{"key":"ref45","unstructured":"Ross AC, Taylor CL, Yaktine AL, Del Valle HB, editors. Dietary Reference Intakes for calcium and vitamin D. Washington (DC): Institute of Medicine (US) Committee to Review Dietary Reference Intakes for Vitamin D and Calcium, 2011."},{"issue":"Suppl 2","key":"ref46","doi-asserted-by":"crossref","first-page":"8962","DOI":"10.1073\/pnas.0914628107","article-title":"Colloquium paper: human skin pigmentation as an adaptation to UV radiation","volume":"107","author":"NG Jablonski","year":"2010","journal-title":"Proc Natl Acad Sci U S A"},{"key":"ref47","first-page":"33","article-title":"&quot;Soleil et peau&quot; [Sun and skin]","author":"TB Fitzpatrick","year":"1975","journal-title":"Journal de M\u00e9decine Esth\u00e9tique"},{"issue":"10","key":"ref48","doi-asserted-by":"crossref","first-page":"2194","DOI":"10.1002\/jbmr.1949","article-title":"The role of vitamin D in improving physical performance in the elderly","volume":"28","author":"V Lagari","year":"2013","journal-title":"J Bone Miner 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Index Ageing. 2018: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/www.pordata.pt\/en\/Europe\/Ageing+index-1609\" xlink:type=\"simple\">https:\/\/www.pordata.pt\/en\/Europe\/Ageing+index-1609<\/ext-link> [accessed 5 March 2018]."},{"key":"ref70","unstructured":"Institute for Environment and Sustainability (IES)\u2014Solar radiation and PV maps\u2013Europe. 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