After publication of this manuscript , we became aware that two citations that cover the prokaryotic SPFH1 proteins (here called paraslipins (SPFH1a) and eoslipins (SPFH1b))  and the association of these SPFH1 proteins with NfeD proteins  which had been included in earlier versions of the manuscript had erroneously gotten lost during the corrections performed in the reviewing process.
We regret any inconvenience that these omissions might have caused and thank Prof. J.P.W. Young for bringing this matter to our attention.
Blood Cells Molecules and Diseases 2004, 32:411-422. Publisher Full Text