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