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Surgery Today > 2004 > 34 > 6 > 537-541
Rheumatology International > 2004 > 24 > 1 > 9-13
Rheumatology International > 2004 > 24 > 1
Veterinary Research Communications > 2002 > 26 > 1 > 21-27
European Journal of Epidemiology > 2000 > 16 > 8 > 719-724