| http://www.w3.org/ns/prov#value | - s an age-related phenomenon and VIP appears mainly in people with degenerated discs, it was important that our study sample consisted of only 40-yr olds.Assumptions to be tested??? We assumed (as seen in most previous studies) that associations between either heavy smoking, overweight or hard physical work when tested one by one for a relationship with self-reported LBP would be weak or non-existe
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