Indexed in Pubmed® and Medline®, products of the United States National Library of Medicine

Indexed in the Journal Citation Reports Science Edition (SCI-indexed) released by Clarivate Analytics (previously the Intellectual Property and Science business of Thomson Reuters)

Frequency:  6

Impact Factor

2016: 2.937 (63/260; 22/77)
2015: 2.018 (69/257; 32/76)
2014: 2.482 (34/249; 27/76)
2013: 3.149 (25/248; 13/76)
2012: 2.743 (27/243; 15/79)

Impact Factor 5-year

2016: 3.657
2015: 2.890
2014: 3.209
2013: 3.371
2012: 3.146

Article Influence Score

2016: 1.099
2015: 1.258
2014: 1.398
2013: 1.273
2012: 1.291

ISSN:  1932-4545