Abstract (1273) | Core Tip (1623) | Full Article (HTML) (3677) | Tables (1-4) (463) | Full Article (PDF)-1000K (596) | Received: 03/07/2013 | Revised: 04/04/2013 | Accepted: 04/17/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (10184) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1399) | Core Tip (1182) | Full Article (HTML) (6195) | Full Article (PDF)-540K (637) | Received: 02/20/2013 | Revised: 03/28/2013 | Accepted: 04/29/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (12) | Total Visits (12389) | Similar Articles (214) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1226) | Core Tip (1146) | Full Article (HTML) (3374) | Tables (1-2) (480) | Full Article (PDF)-720K (390) | Received: 02/14/2013 | Accepted: 04/16/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (9) | Total Visits (9098) | Similar Articles (11) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1310) | Core Tip (1238) | Full Article (HTML) (3929) | Figures (1-1) (879) | Tables (1-4) (876) | Full Article (PDF)-770K (406) | Received: 02/21/2013 | Revised: 03/20/2013 | Accepted: 04/10/2013 | RCA | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (8) | Total Visits (11013) | Similar Articles (5) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open