Abstract (882) | Core Tip (801) | Full Article (HTML) (2828) | Tables (1-4) (159) | Full Article (PDF)-1000K (463) | Received: 03/07/2013 | Revised: 04/04/2013 | Accepted: 04/17/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (7215) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (997) | Core Tip (794) | Full Article (HTML) (4580) | Full Article (PDF)-540K (542) | Received: 02/20/2013 | Revised: 03/28/2013 | Accepted: 04/29/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (12) | Total Visits (9380) | Similar Articles (194) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (816) | Core Tip (752) | Full Article (HTML) (2474) | Tables (1-2) (175) | Full Article (PDF)-720K (296) | Received: 02/14/2013 | Accepted: 04/16/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (9) | Total Visits (6469) | Similar Articles (8) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (902) | Core Tip (779) | Full Article (HTML) (2872) | Figures (1-1) (183) | Tables (1-4) (232) | Full Article (PDF)-770K (314) | Received: 02/21/2013 | Revised: 03/20/2013 | Accepted: 04/10/2013 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (7) | Total Visits (7096) | Similar Articles (5) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open