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The purpose of this book was to help us not to transform in the 21st century to an overpopulated national park, which are numerous in Africa, where wild animals behave as such in front of the tourists. To remain human, we should learn from errors. The literature, especially scientific literature, exists for that purpose. Scientific literature must relentlessly strive for the truth, remaining unbiased even in the presence of a conflict of interest, and strictly adhere to the rules of logics and scientific polemics: to leave no unanswered questions, to repel all taboos and injunctions. If in the science are forbidden topics or prescribed results, the conclusions will be misleading.

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Sergei Jargin graduated from the I.M. Sechenov Moscow Medical Academy in 1983. Postgraduate training in pathology till 1986. Thereafter pathologist and lecturer at the same institution. 1989-1995 - practice of pathology abroad. Since 1995 - pathologist and lecturer at the Peoples´ Friendship University of Russia, Moscow.

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