2Rodacki A L, Fowler N E,Provensi C L, et al. Body mass as a factor in stature change [J]. Clinical Biomechanics,2005, (20) :799-805.
3Roughley P,Martens D, Rantakokko J, et al. The invlvement of aggrecan polymorphism in degeneration of human intervertebral disc and articular catilage [ J ]. European Cells and Materials,2006, ( 11 ) :1-7.
4Snijders C J, Hoek G A, Roosch E R, et al. A biomechanical model for the analysis of the cervical spine in static postures [J]. Biomech,1991,24(9) :183 - 192.
