301,078 VAN DOORN JAN WILLEM C. Low back disability among self-employed dentists, veterinarians, physicians and physical therapists in the Netherlands : a retrospective study over a 13-year period (N-1,119) and an early intervention program with 1-year follow-up. v=-134) / Jan Willem C. van Doom ; from the Institute for Surgical Disciplines, Department of Orthopaedics, Sahlgrenska University Hospital, Göteborg University [...]. -Oslo [etc. ] s Acta Orthopaedica Scandinavica, 1995. - [2], 64 s. : wykr. ; 24 cm (Acta Orthopaedica Scandinavica, ISSN 0300-8827 ; vol. 66, suppl. 263)