Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
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information only on official, secure websites.
The files extensions for the supporting video files were erroneously changed making them difficult to open. The video titles and legends on the article page are still correct. Please download the correct videos here:
Video S1, Video S2, Video S3: http://www.plosone.org/corrections/video_s1_s2_s3.zip
Competing Interests: No competing interests declared.
