Abstract (1430) | Core Tip (1179) | Full Article (HTML) (8189) | Tables (1-3) (233) | Full Article (PDF)-1148K (975) | Peer-Review Report-135K (301) | Answering Reviewers-116K (272) | Received: 03/31/2013 | Revised: 04/30/2013 | Accepted: 06/10/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (112) | Total Visits (15069) | Similar Articles (126) | Timeline of Article Publication (1) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open