Rights:
© 2008 American Physical Society (APS). This is the accepted version of the following article: Alava, Mikko J. & Laurson, Lasse & Vespignani, Alessandro & Zapperi, Stefano. 2008. Comment on "Self-organized criticality and absorbing states: Lessons from the Ising model". Physical Review E. Volume 77, Issue 4. 048101/1-2. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.77.048101, which has been published in final form at http://journals.aps.org/pre/abstract/10.1103/PhysRevE.77.048101.