The paper analyzes the problem of data cleansing and automatically identifying potential errors in data sets. An overview of the diminutive amount of existing literature concerning data cleansing is given. Methods for error detection that go beyond integrity analysis are reviewed and presented. The applicable methods include: statistical outlier detection, pattern matching, clustering, and data...

Chromoendoscopy pertains to image-enhanced endoscopic techniques such as dye-based chromoendoscopy and electronic chromoendoscopy using narrow-band imaging, flexible spectral imaging color enhancement, and i-scan. Dye-based chromoendoscopy has been demonstrated to improve colorectal dysplasia detection in high-risk patients with long-term inflammatory bowel disease, and electronic chromoendosco...

Although nitric oxide (NO) 1 may not modulate all cellular functions and may not be present in all mammalian cells, the sheer volume of publications on the subject might lead one to conclude that this diminutive molecule is both omnipotent and omnipresent in human biology. This series of four Perspective articles, in the current and following issues of The Journal of Clinical Investigation , wi...