1. Allibone, E. C., and Baar, H. S. (1946). Arch. Dis Childh., 21, 76.
2. Baikan, W. S. (1931). Virchow's Arch., 282, 46.
3. 120 may be found in cardiograms;Bernheim-Karrer, J.;Z. Kinderheilk,1923
4. French, A. J., and Weller, C. V. (1942). Amer. J. Path., 18, 112.
5. the changes may be scattered and easily missed if Saphir, 0;Amer. Heart J,1942