Some schooling on backpacks.
Smith
I K
IK
Ianmedical@aol.com
D000293:Adolescent; D019567:Back Injuries / Q000209:etiology / Q000517:prevention & control*; D002648:Child; D004867:Equipment Design; D006804:Ergonomics; D006801:Humans; D017770:Lifting; D012574:Schools; D014481:United States; D016474:Weight-Bearing / Q000502:physiology*