On 2013 Jun 30, Swapnil Hiremath commented:

This is a fascinating attempt at resolving heterogeneity in this field of contrast nephropathy. The ACT study, done later by Berwanger et al in Circulation 2011 http://www.ncbi.nlm.nih.gov/pubmed/21859972, proved conclusively that NAC is not useful. However, this paper, by trying to resolve the cause of the heterogeneity is a fascinating read beyond just the summary outcome measure. As Prof Stoto would say, while doing a systematic review, try to think, 'What is the Story?'

On 2013 Jun 30, Swapnil Hiremath commented:

This is a fascinating attempt at resolving heterogeneity in this field of contrast nephropathy. The ACT study, done later by Berwanger et al in Circulation 2011 http://www.ncbi.nlm.nih.gov/pubmed/21859972, proved conclusively that NAC is not useful. However, this paper, by trying to resolve the cause of the heterogeneity is a fascinating read beyond just the summary outcome measure. As Prof Stoto would say, while doing a systematic review, try to think, 'What is the Story?'