Забележки: At head of title: WHO, OMS, International Agency for Research on Cancer (IARC). - "Reflects the views of a Working Group that convened for an Editorial and Consensus Conference in Lyon, France, November 6-9, 1999"--prelim. p. - "Produced in collaboration with the International Academy of Pathology (IAP) and Swiss Federal Office of Public Health, Bern"--prelim. p.