Abstract (1238) | Core Tip (1547) | Full Article (HTML) (3593) | Tables (1-4) (429) | Full Article (PDF)-1000K (578) | Received: 03/07/2013 | Revised: 04/04/2013 | Accepted: 04/17/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (9837) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1347) | Core Tip (1143) | Full Article (HTML) (6116) | Full Article (PDF)-540K (617) | Received: 02/20/2013 | Revised: 03/28/2013 | Accepted: 04/29/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (12) | Total Visits (12098) | Similar Articles (212) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1181) | Core Tip (1103) | Full Article (HTML) (3306) | Tables (1-2) (433) | Full Article (PDF)-720K (369) | Received: 02/14/2013 | Accepted: 04/16/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (9) | Total Visits (8782) | Similar Articles (11) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1268) | Core Tip (1196) | Full Article (HTML) (3811) | Figures (1-1) (807) | Tables (1-4) (806) | Full Article (PDF)-770K (386) | Received: 02/21/2013 | Revised: 03/20/2013 | Accepted: 04/10/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (8) | Total Visits (10556) | Similar Articles (5) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open