Key points are not available for this paper at this time.
The resource can be accessed at the following external link: http://onlinelibrary.wiley.com/doi/10.1111/j.1759-5436.2008.tb00431.x/abstract
Antonie Kemp (2009) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: