Reader Comments

Post a new comment on this article

What is the difference between "common" and "ubiquitous" in the context of this article?

Posted by Testerz on 08 Apr 2013 at 20:58 GMT

The authors did not provide their definitions of what they consider "common" and what "ubiquitous"

No competing interests declared.

RE: What is the difference between "common" and "ubiquitous" in the context of this article?

Testerz replied to Testerz on 08 Apr 2013 at 21:04 GMT

Ah, found it.

No competing interests declared.