Ключевые слова: ache, adult, africanamerican ethnicity, back, backache, backache backpain, body, care, cramp, disease, female, health, home, hurt, illness, injury, injury insurance, latin, latin america, lumbago lumbar, lumbar, muscle, pain, painful, painful people, person, problem, problems, rubbing sad, sickness, sitting, spasm spinal, spine stiff, strain stress, suffer symptom, touching, treatment trouble, uncomfortable unhappy, upset vertebra, woman, women,