To the Editors: Of course we agree with Kristal et al. (1) that validity is an issue of degree rather than a dichotomy and that multiple methods will usually be useful when evaluating validity because a perfect standard is rarely available. However, their examples based on face validity, construct validity, and predictive validity do not provide evidence that food frequency questionnaires shoul...

How and when did your company start, and where are you located? NovaDigm was founded in 2005 by a group of investigators at the los Angeles Biomedical research institute (lA BioMed) and the Division of infectious Diseases at Harbor-UclA Medical center. The company received its first venture capital funding from Domain Associates in 2008 and established its corporate headquarters and laboratory ...

RESEARCHERS and veterinary clinicians from the University of Liverpool have launched a research programme exploring horse owners’ understanding and experiences of equine health. The current study, funded and supported by the Animal Welfare Foundation (of the BVA), is inviting horse owners to participate in a questionnaire to share their views and experiences of equine health and disease with a ...