RT Journal Article SR Electronic T1 Response to: ‘Overweight/obesity and vitamin D deficiency contribute to the global burden of low back pain’ by Professor Grant JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP e49 OP e49 DO 10.1136/annrheumdis-2014-205633 VO 73 IS 8 A1 Damian Hoy A1 Lyn March A1 Peter Brooks A1 Fiona Blyth A1 Anthony Woolf A1 Emma Smith A1 Rachelle Buchbinder YR 2014 UL http://ard.bmj.com/content/73/8/e49.abstract AB