1. H. Danielsson and K. Einarsson, in “The Biological Basis of Medicine” (E. E. Bittar and N. Bittar, eds.), p. 279, Academic Press, London (1969).
2. S. Linstedt, in Atherosclerosis: Proceedings of the Second International Symposium (R. J. Jones, ed.), p. 262, Springer-Verlag, New York (1970).
3. H. Greim, D. Trülzsch, P. Czygan, F. Hutterer, F. Schaffner, and H. Popper, Ann. N.Y. Acad. Sci. 212, 139 (1973).
4. I. W. Percy-Robb and G. S. Boyd, Scott. Med. J. 18, 166 (1973).
5. E. H. Mosbach and G. Salen, Digestive Diseases 19, 920 (1974).