ISSN: 0021-9746
EISSN: 1472-4146
Scimago Journal Ranking (2013): 0,141
Hirsh Index: 19
Availability: 1947-present (embargo: 36 months)
Free access to all articles prior to 2006. A one-time registration needs to be completed to access the archive, here: http://journals.bmj.com/cgi/register