Note Fibrogen has some potentially blocking patents in the US - no idea whether they will hold up - I have always assumed not. Here's one: The present invention relates to methods for treating anemia in a subject having a low percent transferrin saturation by administering to the subject an effective amount of a compound that inhibits hypoxia-inducible factor prolyl hydroxylase activity. http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=30&f=G&l=50&co1=AND&d=PTXT&s1=fibrogen.ASNM.&OS=AN/fibrogen&RS=AN/fibrogen