On 2015 Apr 02, Harri Hemila commented:

Errors in the extraction and analysis of data in the Cochrane review on vitamin C supplementation for asthma by Ram FS, 2004.

This Cochrane review (2004) by Ram FS, 2004 is an update of the 2001 Cochrane review on vitamin C and asthma by Kaur B, 2001. This 2004 Cochrane review update suffers from the same errors in the extraction and analysis of data as the 2001 version. See a summary of the errors in the 2001 Cochrane review in Pubmed Commons. Furthermore, the same errors were repeated in the 2009 Cochrane review update by Kaur B, 2009. See a summary of the main errors in the 2009 version of the Cochrane review in Pubmed Commons. The Cochrane review on vitamin C supplementation for asthma was withdrawn by Kaur B, 2013. Thus, the Cochrane review initially published in 2001 by Kaur B, 2001 misled readers for over a decade before it was withdrawn.

On 2015 Apr 02, Harri Hemila commented:

Errors in the extraction and analysis of data in the Cochrane review on vitamin C supplementation for asthma by Ram FS, 2004.

This Cochrane review (2004) by Ram FS, 2004 is an update of the 2001 Cochrane review on vitamin C and asthma by Kaur B, 2001. This 2004 Cochrane review update suffers from the same errors in the extraction and analysis of data as the 2001 version. See a summary of the errors in the 2001 Cochrane review in Pubmed Commons. Furthermore, the same errors were repeated in the 2009 Cochrane review update by Kaur B, 2009. See a summary of the main errors in the 2009 version of the Cochrane review in Pubmed Commons. The Cochrane review on vitamin C supplementation for asthma was withdrawn by Kaur B, 2013. Thus, the Cochrane review initially published in 2001 by Kaur B, 2001 misled readers for over a decade before it was withdrawn.