The Growth factor reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Growth factor

For people who check facts
Growth factor is any of about twenty small proteins that attach to specific receptors on the surface of stem cells in bone marrow and promote differentiation and maturation of these cells into morphotic constituents of blood.

The most important growth factors are :

For the last two decades growth factors have been increasingly used in treatment of hematologic and oncologic diseases like :