www.coccyx.org > medical papers
/ Coccygodynia
/ The American Journal of Surgery
/ May 1939, New Series Volume XLIV, number 2, page 390
/ Nixon, Edwin. A. ... In 1932, KIeckner2 injected a 5 per cent solution of
quinine and urea...
http://www.coccyx.org/medabs/nixon.htm