Reader Comments

Post a new comment on this article

Publisher's Note: Correction to Equations 17 and 19

Posted by PLOS_ONE_Group on 24 Feb 2009 at 22:58 GMT

By (18), can be determined with the function below:
http://plosone.org/article/info:doi/10.1371/journal.pone.0004168#article1.body1.sec2.sec3.p2

Equations 17 and 19 appear incorrectly. The corrected Equations 17 and 19 can be found here: http://www.plosone.org/corrections/pone.0004168.e034e037.cn.tif