%0 Journal Article %T Prevalence of chronic idiopathic musculoskeletal pain and headache in adolescence: a population based Norwegian study %A Hoftun Gry B %A Romundstad P£¿l R %A Zwart John-Anker %A Rygg Marite %J Pediatric Rheumatology %D 2012 %I BioMed Central %R 10.1186/1546-0096-10-s1-a77 %U http://www.ped-rheum.com/content/10/S1/A77