I posted a link about igf here awhile ago.hope it helps somebody.
http://www.breastnexus.com/showthread.php?tid=25696&pid=199863#pid199863
http://www.breastnexus.com/showthread.php?tid=25696&pid=199863#pid199863
http://www.breastnexus.com/showthread.php?tid=25696&pid=199863#pid199863
http://www.breastnexus.com/showthread.php?tid=25696&pid=199863#pid199863