2Diepenmaat AC, Vander WAL MF, De Vet HC,et al. Neck/Shoul- der,low Back, and arm pain in relation to eomputerusc, physical activity, stress, and depression among dutch adoles - cents [ J ]. Pe- diatrics ,2006,117 (2) :412 - 416.
3Fejer R, Hartvigsen J, Kyvik KO. Heritability of neckpain : apopula- tion - based study of 33,794 Danish twins[ J]. Rheu - matology, 2006,45 ( 5 ) :589 - 594.