New drugs for old diseases.
D003906:Developing Countries; D004345:Drug Industry; D006373:Helminthiasis / Q000188:drug therapy; D049673:History, 20th Century; D006801:Humans; D010272:Parasitic Diseases / Q000188:drug therapy* / Q000266:history; D010879:Piperazines / Q000266:history / Q000627:therapeutic use; D014330:Tropical Medicine / Q000639:trends; D014944:World Health Organization
D010879:Piperazines