Abstract (721) | Core Tip (765) | Full Article (HTML) (2725) | Full Article (PDF)-772K (409) | Full Article (Word)-125K (187) | Peer-Review Report-66K (131) | Answering Reviewers-152K (118) | Received: 05/21/2015 | Revised: 07/09/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (9) | Total Visits (8380) | Similar Articles (972) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (772) | Core Tip (651) | Full Article (HTML) (3544) | Figures (1-2) (122) | Full Article (PDF)-989K (413) | Full Article (Word)-295K (175) | Peer-Review Report-94K (131) | Answering Reviewers-489K (163) | Received: 04/10/2015 | Revised: 05/29/2015 | Accepted: 08/31/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (14) | Total Visits (9721) | Similar Articles (220) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (824) | Core Tip (1020) | Full Article (HTML) (8209) | Figures (1-4) (170) | Tables (1-1) (105) | Full Article (PDF)-1342K (1146) | Full Article (Word)-784K (355) | Peer-Review Report-119K (193) | Answering Reviewers-389K (214) | Received: 04/15/2015 | Revised: 06/17/2015 | Accepted: 09/14/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (97) | Total Visits (17252) | Similar Articles (4) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (866) | Core Tip (803) | Full Article (HTML) (15898) | Figures (1-2) (968) | Full Article (PDF)-1922K (839) | Full Article (Word)-1241K (321) | Peer-Review Report-100K (262) | Answering Reviewers-69K (253) | Received: 06/26/2015 | Revised: 07/31/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (51) | Total Visits (25765) | Similar Articles (208) | Timeline of Article Publication (1) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (762) | Core Tip (767) | Full Article (HTML) (3934) | Tables (1-3) (111) | Full Article (PDF)-1114K (601) | Full Article (Word)-216K (230) | Peer-Review Report-95K (161) | Answering Reviewers-84K (162) | Received: 04/28/2015 | Revised: 07/11/2015 | Accepted: 08/31/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (20) | Total Visits (9882) | Similar Articles (123) | Timeline of Article Publication (6) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1241) | Core Tip (1151) | Full Article (HTML) (13216) | Figures (1-3) (2580) | Tables (1-4) (112) | Full Article (PDF)-1313K (1108) | Full Article (Word)-963K (419) | Peer-Review Report-122K (227) | Answering Reviewers-141K (211) | Received: 04/28/2015 | Revised: 07/29/2015 | Accepted: 09/14/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (45) | Total Visits (24398) | Similar Articles (305) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (957) | Core Tip (837) | Full Article (HTML) (10955) | Tables (1-2) (125) | Full Article (PDF)-1208K (1636) | Full Article (Word)-271K (323) | Peer-Review Report-128K (235) | Answering Reviewers-118K (225) | Received: 04/28/2015 | Revised: 07/23/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (192) | Total Visits (20433) | Similar Articles (820) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (952) | Core Tip (869) | Full Article (HTML) (4194) | Figures (1-1) (208) | Tables (1-1) (142) | Full Article (PDF)-1119K (538) | Full Article (Word)-311K (275) | Peer-Review Report-79K (186) | Answering Reviewers-239K (180) | Received: 05/08/2015 | Revised: 08/08/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (17) | Total Visits (11087) | Similar Articles (43) | Timeline of Article Publication (1) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (1119) | Core Tip (922) | Full Article (HTML) (10533) | Figures (1-2) (139) | Tables (1-2) (123) | Full Article (PDF)-1166K (2000) | Full Article (Word)-474K (338) | Peer-Review Report-82K (198) | Answering Reviewers-10K (248) | Received: 06/16/2015 | Revised: 08/06/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (82) | Total Visits (20534) | Similar Articles (197) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (974) | Core Tip (899) | Full Article (HTML) (3634) | Figures (1-2) (125) | Tables (1-4) (116) | Full Article (PDF)-1290K (413) | Full Article (Word)-750K (292) | Peer-Review Report-218K (164) | Answering Reviewers-366K (185) | Received: 06/02/2015 | Revised: 07/14/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (6) | Total Visits (10806) | Similar Articles (970) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (891) | Core Tip (727) | Full Article (HTML) (4851) | Tables (1-3) (156) | Full Article (PDF)-1094K (592) | Full Article (Word)-327K (323) | Peer-Review Report-79K (213) | Answering Reviewers-172K (213) | Received: 04/28/2015 | Revised: 08/14/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (25) | Total Visits (11017) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (873) | Core Tip (781) | Full Article (HTML) (4546) | Tables (1-4) (152) | Full Article (PDF)-1226K (730) | Full Article (Word)-356K (308) | Peer-Review Report-92K (194) | Answering Reviewers-63K (176) | Received: 05/09/2015 | Revised: 07/08/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (37) | Total Visits (12007) | Similar Articles (1009) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (849) | Core Tip (896) | Full Article (HTML) (5503) | Figures (1-3) (167) | Tables (1-1) (116) | Full Article (PDF)-1241K (806) | Full Article (Word)-434K (405) | Peer-Review Report-93K (230) | Answering Reviewers-358K (257) | Received: 05/21/2015 | Revised: 07/16/2015 | Accepted: 09/22/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (39) | Total Visits (13619) | Similar Articles (332) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (650) | Core Tip (702) | Full Article (HTML) (5134) | Figures (1-1) (169) | Full Article (PDF)-944K (553) | Full Article (Word)-200K (258) | Peer-Review Report-91K (136) | Answering Reviewers-247K (171) | Received: 04/27/2015 | Revised: 07/11/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (101) | Total Visits (11436) | Similar Articles (1139) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (862) | Core Tip (842) | Full Article (HTML) (6178) | Figures (1-1) (173) | Tables (1-1) (123) | Full Article (PDF)-935K (776) | Full Article (Word)-198K (288) | Peer-Review Report-79K (163) | Answering Reviewers-144K (193) | Received: 04/27/2015 | Revised: 08/12/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (132) | Total Visits (12600) | Similar Articles (977) | Timeline of Article Publication (2) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (866) | Core Tip (886) | Full Article (HTML) (10016) | Figures (1-2) (769) | Full Article (PDF)-1185K (1152) | Full Article (Word)-711K (340) | Peer-Review Report-87K (186) | Answering Reviewers-132K (229) | Received: 04/27/2015 | Revised: 07/02/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (42) | Total Visits (18215) | Similar Articles (551) | Timeline of Article Publication (1) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (748) | Core Tip (690) | Full Article (HTML) (3538) | Tables (1-5) (157) | Full Article (PDF)-942K (512) | Full Article (Word)-225K (217) | Peer-Review Report-80K (181) | Answering Reviewers-96K (116) | Received: 04/21/2015 | Revised: 07/21/2015 | Accepted: 09/14/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (28) | Total Visits (9114) | Similar Articles (184) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (826) | Core Tip (839) | Full Article (HTML) (8530) | Figures (1-1) (115) | Tables (1-5) (133) | Full Article (PDF)-2155K (697) | Full Article (Word)-917K (373) | Peer-Review Report-170K (228) | Answering Reviewers-443K (246) | Received: 05/28/2015 | Revised: 07/28/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (65) | Total Visits (16182) | Similar Articles (799) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (820) | Core Tip (846) | Full Article (HTML) (3594) | Figures (1-2) (119) | Tables (1-1) (139) | Full Article (PDF)-1096K (594) | Full Article (Word)-470K (202) | Peer-Review Report-79K (128) | Answering Reviewers-96K (137) | Received: 04/27/2015 | Revised: 07/07/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (25) | Total Visits (9411) | Similar Articles (801) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (827) | Core Tip (757) | Full Article (HTML) (6298) | Figures (1-2) (187) | Full Article (PDF)-1507K (699) | Full Article (Word)-437K (270) | Peer-Review Report-99K (201) | Answering Reviewers-176K (242) | Received: 04/28/2015 | Revised: 06/25/2015 | Accepted: 08/31/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (39) | Total Visits (13198) | Similar Articles (799) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (802) | Core Tip (807) | Full Article (HTML) (7078) | Tables (1-3) (150) | Full Article (PDF)-995K (956) | Full Article (Word)-230K (248) | Peer-Review Report-81K (206) | Answering Reviewers-295K (177) | Received: 04/19/2015 | Revised: 06/20/2015 | Accepted: 08/31/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (189) | Total Visits (15603) | Similar Articles (799) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (673) | Core Tip (725) | Full Article (HTML) (5483) | Figures (1-2) (228) | Tables (1-3) (126) | Full Article (PDF)-1589K (582) | Full Article (Word)-597K (242) | Peer-Review Report-101K (163) | Answering Reviewers-197K (190) | Received: 04/28/2015 | Revised: 06/18/2015 | Accepted: 08/31/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (32) | Total Visits (12697) | Similar Articles (159) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (724) | Core Tip (722) | Full Article (HTML) (3405) | Tables (1-3) (120) | Full Article (PDF)-1040K (475) | Full Article (Word)-214K (305) | Peer-Review Report-95K (169) | Answering Reviewers-64K (135) | Received: 05/18/2015 | Revised: 08/06/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (25) | Total Visits (9677) | Similar Articles (371) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (867) | Core Tip (727) | Full Article (HTML) (7831) | Figures (1-1) (152) | Tables (1-4) (107) | Full Article (PDF)-1052K (1411) | Full Article (Word)-365K (354) | Peer-Review Report-94K (216) | Answering Reviewers-142K (207) | Received: 04/28/2015 | Revised: 08/06/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (141) | Total Visits (15879) | Similar Articles (68) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (781) | Core Tip (831) | Full Article (HTML) (9248) | Figures (1-1) (242) | Tables (1-1) (112) | Full Article (PDF)-1262K (844) | Full Article (Word)-518K (267) | Peer-Review Report-108K (168) | Answering Reviewers-203K (164) | Received: 04/16/2015 | Revised: 06/19/2015 | Accepted: 09/14/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (38) | Total Visits (17148) | Similar Articles (158) | Timeline of Article Publication (3) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (926) | Core Tip (892) | Full Article (HTML) (8868) | Tables (1-2) (105) | Full Article (PDF)-948K (706) | Full Article (Word)-156K (219) | Peer-Review Report-91K (184) | Answering Reviewers-166K (249) | Received: 06/27/2015 | Revised: 09/02/2015 | Accepted: 09/15/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (53) | Total Visits (15385) | Similar Articles (130) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (776) | Core Tip (666) | Full Article (HTML) (4090) | Figures (1-8) (169) | Tables (1-3) (106) | Full Article (PDF)-2831K (676) | Full Article (Word)-3886K (280) | Peer-Review Report-97K (170) | Answering Reviewers-83K (229) | Received: 04/14/2015 | Revised: 06/18/2015 | Accepted: 08/31/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (40) | Total Visits (11154) | Similar Articles (118) | Timeline of Article Publication (1) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (698) | Core Tip (732) | Full Article (HTML) (5568) | Figures (1-8) (207) | Tables (1-1) (107) | Full Article (PDF)-1599K (709) | Full Article (Word)-1192K (318) | Peer-Review Report-106K (151) | Answering Reviewers-364K (157) | Received: 04/28/2015 | Revised: 06/24/2015 | Accepted: 09/02/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (16) | Total Visits (12742) | Similar Articles (0) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (798) | Core Tip (754) | Full Article (HTML) (7278) | Figures (1-4) (310) | Tables (1-1) (101) | Full Article (PDF)-1123K (702) | Full Article (Word)-1300K (220) | Peer-Review Report-95K (157) | Answering Reviewers-82K (110) | Received: 02/09/2015 | Revised: 06/09/2015 | Accepted: 08/31/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (35) | Total Visits (15293) | Similar Articles (803) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (918) | Core Tip (875) | Full Article (HTML) (7579) | Figures (1-2) (126) | Tables (1-2) (110) | Full Article (PDF)-1429K (881) | Full Article (Word)-809K (310) | Peer-Review Report-94K (210) | Answering Reviewers-115K (634) | Received: 06/10/2015 | Revised: 08/07/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (33) | Total Visits (15218) | Similar Articles (1498) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open

Abstract (868) | Core Tip (725) | Full Article (HTML) (3489) | Figures (1-1) (111) | Tables (1-4) (111) | Full Article (PDF)-980K (558) | Full Article (Word)-234K (177) | Peer-Review Report-113K (113) | Answering Reviewers-177K (157) | Received: 03/26/2015 | Accepted: 09/30/2015 | PubMed Central | PubMed | CrossRef | Google Scholar | Times Cited (43) | Total Visits (9983) | Similar Articles (193) | Timeline of Article Publication (0) | Article Quality Tracking (0) | What about the content of this article? (0) | Cite |  (0) | Open