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Mokkink, Lidwine B.; Terwee, Caroline. B.; Knol, Dirk L.; Stratford, Paul W.; Alonso Caballero, Jordi; Patrick, Donald L.; Bouter, Lex M.; De Vet, Henrica C. W.(BioMed Central, 2006)
Mokkink, Lidwine B.; Terwee, Caroline. B.; Knol, Dirk L.; Stratford, Paul W.; Alonso Caballero, Jordi; Patrick, Donald L.; Bouter, Lex M.; De Vet, Henrica C. W.(BioMed Central, 2010)