Abstract (1077) | Core Tip (1183) | Full Article (HTML) (3137) | Tables (1-4) (254) | Full Article (PDF)-1000K (524) | Received: 03/07/2013 | Revised: 04/04/2013 | Accepted: 04/17/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (8446) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1138) | Core Tip (957) | Full Article (HTML) (4882) | Full Article (PDF)-540K (565) | Received: 02/20/2013 | Revised: 03/28/2013 | Accepted: 04/29/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (12) | Total Visits (10217) | Similar Articles (204) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1003) | Core Tip (932) | Full Article (HTML) (2824) | Tables (1-2) (254) | Full Article (PDF)-720K (322) | Received: 02/14/2013 | Accepted: 04/16/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (9) | Total Visits (7515) | Similar Articles (10) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1057) | Core Tip (971) | Full Article (HTML) (3266) | Figures (1-1) (436) | Tables (1-4) (486) | Full Article (PDF)-770K (337) | Received: 02/21/2013 | Revised: 03/20/2013 | Accepted: 04/10/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (8598) | Similar Articles (5) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open