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1by Moher,David, Cook,Deborah J, Eastwood,Susan, Olkin,Ingram, Rennie,Drummond, Stroup,Donna F
Published 2000Digital revistaSCIELO -
2by Begg,Colin, Cho,Mildred, Eastwood,Susan, Horton,Richard, Moher,David, Olkin,Ingram, Pitkin,Roy, Rennie,Drummond, Schulz,Kenneth F, Simel,David, Stroup,Donna F
Published 1998Digital revistaSCIELO