21. Februar 2017 | Illegal
The temporal relationship between drug supply indicators: an audit of international government surveillance systems
The temporal relationship between drug supply indicators: an audit of international government surveillance systems
Werb D, Kerr T, Nosyk B, et al BMJ Open 2013;3:e003077. doi: 10.1136/bmjopen-2013-003077
http://bmjopen.bmj.com/content/3/9/e003077