Optical methods of biomedical diagnostics and therapy : 1-3 July 1992, Saratov, Russia / Valery V. Tuchin, chair/editor ; organized by Saratov State University, Saratov Medical Institute, Saratov Institute of Rural Hygiene ; cosponsored by SPIE/Russia--the International Society for Optical Engineering/Russia Chapter, Saratov Scientific Research Institute "Volga," [and] Saratov Center for Control and Exploration of Physical Fields and Radiations, Russian Academy of Sciences