Study A5091075, an observational study in subjects who had previously been treated with torcetrapib, was terminated on 20 Dec 2007. The study was terminated following reviews of final safety information from prior torcetrapib studies and the low participation rates observed during the recruitment period for study A5091075 . On the basis of this new information the Sponsor determined that it was unlikely that this study would result in new and scientifically valid information.