The above article (DOI:10.1002/hec.1161) was published online on 15 September 2006 in Wiley InterScience (www.interscience.wiley.com). A printing error was subsequently identified in Figure 2 of the article. The corrected figure is printed below. The print publication will incorporate the corrected figure.
The publishers accept full responsibility for this error and would like to apologise for any confusion caused.
Secondly, it should be noted that the first author of the article, Simon Eckermann is also affiliated to the NHMRC Clinical Trial Centre, Sydney University.