Abstract (1256) | Core Tip (1582) | Full Article (HTML) (3627) | Tables (1-4) (445) | Full Article (PDF)-1000K (583) | Received: 03/07/2013 | Revised: 04/04/2013 | Accepted: 04/17/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (9987) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1376) | Core Tip (1167) | Full Article (HTML) (6157) | Full Article (PDF)-540K (627) | Received: 02/20/2013 | Revised: 03/28/2013 | Accepted: 04/29/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (12) | Total Visits (12253) | Similar Articles (212) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1203) | Core Tip (1127) | Full Article (HTML) (3338) | Tables (1-2) (456) | Full Article (PDF)-720K (380) | Received: 02/14/2013 | Accepted: 04/16/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (9) | Total Visits (8937) | Similar Articles (11) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1292) | Core Tip (1223) | Full Article (HTML) (3869) | Figures (1-1) (844) | Tables (1-4) (844) | Full Article (PDF)-770K (397) | Received: 02/21/2013 | Revised: 03/20/2013 | Accepted: 04/10/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (8) | Total Visits (10791) | Similar Articles (5) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open