  Dissipative particle dynamics (DPD) is now a well-established method for
simulating soft matter systems. However, its applicability was recently
questioned because some investigations showed an upper coarse-graining limit
that would prevent the applicability of the method to the whole mesoscopic
range. This article aims to reestablish DPD as a truly scale-free method by
analyzing the problems reported by other authors and by presenting a scaling
scheme that allows one to gauge a DPD-simulation to any desired length scale.
