We have recently become aware of two cases of publication of closely related data in papers submitted concurrently toThorax and to another journal, without disclosure of the existence of the related paper. One of these concerns papers by Girault et al 1 ,2 and relates to a study of two forms of assisted ventilation in which the data published in Thorax 1represent part of a study also published inChest.2 In the review process of the Thorax paper, which dealt with characteristics of assist control …