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It is not an issue of a single retraction.  There are several ""expressions of concern"" issued by prominent journals in recent years. While a single questionable paper would not be appropriate in a BLP unless it was an egregious violation of scientific ethics, a repeated pattern of papers with problems in the data is worthy of a mention. If sources are the issue, linking to the actual journal expressions of concern instead of Retraction Watch is an option. 72.21.225.66  "