The issue of Rockwell Medical has been discussed with regard to aluminum contamination and their shoddy -- say criminal manufacturing processes.
Likewise, the issue of their active attempt to penetrate the CKD marketplace with vitamin D (Calcitriol), an ESA (e.g., Epogen), and iron supplement are known.
Their iron supplement received an FDA advisory panel approval by a vote of 8-3 this week but not without serious issues and controversy.
Here's a link to a news report on the situation.
http://www.thestreet.com/story/12945576/1/rockwell-dialysis-therapy-wins-panel-support-but-final-fda-approval-not-so-fast.html