Sections under review pending move to subarticle:
Overview & history
Edit note 1
Thanks, Lisa. It is under review. An updated version will be added to a history subpage for the main article soon. Lisa G.
Edit note 2
See also History of Bayer subsection. (Checked & added ref tags for para endings, removed redundant ref tag & moved to subsection. Lisa L. August 17, 2011