Editor's Note: Correction of Missing Page in the June 2010 Issue

In the June 2010 (volume 85, number 6) issue of Mayo Clinic Proceedings, a production error resulted in the redundant publication of page 518 and the omission of page 520 from the print (but not the electronic) version of the journal. To correct this error, page 694 of this July issue provides a reproduction of the missing page, formatted in a manner that will permit photocopying and substitution for the erroneously duplicated page. The journal's leadership regrets this error and apologizes to the authors and readers for any inconvenience the error has caused.