This link seems to have much more specific data from the original study:

http://www.sciencedaily.com/releases/2011/11/111114221018.ht...

EDIT: The abstract is available from the publishing journal in the following link. The full text was unfortunately not available without a subscription of some form.

http://jech.bmj.com/content/early/2011/10/28/jech-2011-20025...