METHODOLOGICAL APPROACHES TO THE ANALYSIS OF THE ACTIVITIES OF THE CANCER SERVICE ON THE BASIS OF THE FORMS OF STATE REPORTING AND THE DATABASE OF THE POPULATION CANCER REGISTER OF THE NORTHWESTERN FEDERAL DISTRICT. PART 1. Вопр. онкол. [Internet]. 2019 May 1 [cited 2026 Oct. 14];65(5):653-6. Available from: https://voprosyonkologii.ru/index.php/journal/article/view/1011