The hanging committee of Sexually Transmitted Infections wishes to announce that two published papers by van Valkengoed et al^{1, 2} exhibit a degree of overlap. Specifically, the female patients are the same in both papers. They are indistinguishable from the point of population size (5714), age (15–40), setting, participation rate (51%), chlamydia prevalence rate (2.8%; CI 2.1–3.4%), and the number of women excluded because of never having been sexually active (125). There is …