By Slappendel Robert   Dirksen Ris   Weber Eric   van der Schaaf Dick   in Acta Orthopaedica Scandinavica

ISSN:0001-6470|74|5|569-575

Informa Healthcare‎(2003)‎

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By Willems Paul   Elmans Leon   Anderson Patricia   Jacobs Wilco   Schaaf Dick   Kleuver Marinus   in European Spine Journal

ISSN:0940-6719|15|10|1487-1494

Springer Publishing Company ‎(2006)‎

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