%0 Journal Article %E David J Unsworth %A Sarah Johnston %T Designer drugs: the biologic therapies %D 2006 %R 10.7861/clinmedicine.6-4-337 %J Clinical Medicine %P 337-343 %V 6 %N 4 %U https://www.rcpjournals.org/content/clinmedicine/6/4/337.full.pdf