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Foreword

Foreword

Page S3 | Received 31 Aug 2009, Accepted 31 Aug 2009, Published online: 29 Jan 2010
 

Abstract

“One reason for the comparative dearth of validation studies may be that it is more fun to dream up a plausible procedure than it is to find that it doesn't work! However, another reason is that it is very difficult to obtain useful validation evidence.” Citation

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