The technique was originally developed in the Spring of 2007 by a team led by Jeff W. Lichtman and Joshua R. Sanes, both professors of Molecular & Cellular Biology in the Department of Neurobiology at Harvard Medical School.
Peacemaker's Guide to Warmongers: Exposing Robert Spencer, Osama bin Laden, David Horowitz, Mullah Omar, Bill Warner, Ali Sina and other Enemies of Peace (English, 2010-2012, Brainbow Press, ISBN 978-0-9796715-3-1).