The preprint can be found here [1].  It should more or less be identical to the journal article.<p>[1]: <a href="http:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;1507.02679" rel="nofollow">http:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;1507.02679</a>