NDT Advance Access published online on April 9, 2008
Nephrology Dialysis Transplantation, doi:10.1093/ndt/gfn199
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© The Author [2008]. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org
Clinical research of kidney diseases II: problems of study design
1 Clinical Epidemiology Unit, Faculty of Medicine, Memorial University of Newfoundland, Canada 2 Divisione di Nefrologia, Azienda Istituti Ospitalieri di Cremona, Italy
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Nephrol. Dial. Transplant.,