Wieland H, Funke H, Krieg J, Luley C.
ApoE3-Freiburg and apoE4-Freiburg are two genetic apoE variants which are caused by exchanges of uncharged amino acids and do not appear to be associated with lipid disorders or heart disease. Abstract.
Book of the Ninth International Symposium on Atherosclerosis. Rosemont, Illinois 1991. P. 164.