Abstract (1354) | Core Tip (1761) | Full Article (HTML) (3971) | Tables (1-4) (538) | Full Article (PDF)-1000K (626) | Received: 03/07/2013 | Revised: 04/04/2013 | Accepted: 04/17/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (11049) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1481) | Core Tip (1275) | Full Article (HTML) (6572) | Full Article (PDF)-540K (667) | Received: 02/20/2013 | Revised: 03/28/2013 | Accepted: 04/29/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (13) | Total Visits (13265) | Similar Articles (226) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1330) | Core Tip (1235) | Full Article (HTML) (3550) | Tables (1-2) (567) | Full Article (PDF)-720K (432) | Received: 02/14/2013 | Accepted: 04/16/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (11) | Total Visits (9939) | Similar Articles (13) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1433) | Core Tip (1337) | Full Article (HTML) (4171) | Figures (1-1) (1028) | Tables (1-4) (994) | Full Article (PDF)-770K (440) | Received: 02/21/2013 | Revised: 03/20/2013 | Accepted: 04/10/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (8) | Total Visits (12069) | Similar Articles (5) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open