Flessibile come il bambù
Bibliografia
Benn R.T., Wood P.H.N . : Pain in the back: an attempt to estimate the size of the problem . Rheumatol. Rehabil., 14 (3), 121, 1975.
Frymojer J., Pope M.H., Costanza M.C. et al . : Epidemiologic studies of low bach pain Spine , 5, 419, 1980.
Horal J . : The clinical appareance of low back disorders . Acta Orthop. Scand. (Suppl.), 118, 7, 1969.
Hult L . : Cervical, dorsal and lumbar spinal syndromes . Acta Orthop. Scand. (Suppl.), 17, 1954.
Kelsey J.L . : An epidemiological study of the relationship between occupations and acute herniated lumbar intervertebral discs .
Nachemson A.L . : The lumbar spine: an othopedic challenge . Spine, 1, 59, 1976.
National Center for Health Statistics: Limitations of activity due to chronic conditions - United States 1969-70. Serie 10, Number 80, 1973.