Chilean scientists Ramiro Arratia und Rodrigo Ramírez-Tagle from Chemistry Science Department of Andrés Bello University, Santiago explain the characteristics of rhenium salts. Mineral composition created by them to detect and attack cancerous cells (Link below, in Spanish). 52% of worldwide Rhenium-produktion came from Chile.

http://noticias.unab.cl/investigacion/el-mercurio-cientificos-chilenos-descubren-que-un-mineral-detecta-el-cancer/