Abstract (1725) | Core Tip (1488) | Full Article (HTML) (9618) | Tables (1-3) (451) | Full Article (PDF)-1148K (3223) | Peer-Review Report-135K (376) | Answering Reviewers-116K (342) | Received: 03/31/2013 | Revised: 04/30/2013 | Accepted: 06/10/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (129) | Total Visits (20146) | Similar Articles (140) | Timeline of Article Publication (1) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open