1. Aldrich, G. A., J. Am. Med. Ass., Chicago, 1930, XCIV, 1637.
2. Diseases of the Kidney,;Ball, W.G.; Evans, G.;London,1932
3. Cassell, Berlin klin. Woch., Berlin, 1904, XLI, 558.
4. Copeman, W. S. C., Clin. J., Lond., 1927, LVI, 166.
5. Text book of Pediatrics;Griffith, J.P.C.; Mitchell,443.