Recently, Biere-Safi et al published the results from their analyses of the PHARMO database describing the relation between statin use and the recurrence of pulmonary embolism (pubmed). This article was topic of a heated debate on our department: is it really possible that statin use halves the risk of recurrence in this patient group? During this discussion we found some issues that could led to an overestimation of the underlying true protective effect. We described these issues in a letter to the editor which has been accepted as an e-letter. Some journals use e-letters to facilitate a faster and more vivid debate after a publication, but unfortunately, these e-letters are only to be found at the website of the publisher and not for example in Web Of Scienc or Pubmed. This could mean that these critical parts of the scientific debate could have a smaller reach, which is a pity.