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Topics related to "Physical Dosimetry and Biological Indicators of Carcinogenic Risk in a Cohort"

cohort cohort
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Cohort Study Cohort Study
COHORT STUDY In the analytic method of epidemiological study called a cohort study, subsets of a defined population are identified and categorized on the basis of exposure to known levels of a risk factor that is believed to be associated with a disease outcome such as coronary heart disease or... Read more
Lagomorphs Lagomorphs
Lagomorpha (Duplicidentata; infraclass Eutheria, cohort Glires) An order that comprises the families Eurymylidae (extinct forms), Ochotonidae (pikas), and Leporidae (rabbits, cottontails, and hares). The lagomorphs are believed to have diverged from a primitive eutherian stock at the same time as,... Read more
Baleen whales Baleen whales
Mysticeti (baleen whales; cohort Mutica, order Cetacea) A suborder that comprises three families (Eschrichtiidae, Balaenidae, and Balaenopteridae) of baleen whales. Teeth are absent in adults (vestigial teeth may be present in the foetus) and transverse sheets of baleen extend like combs from the... Read more
Longitudinal Study Longitudinal Study
Longitudinal study Research method used to study changes over time. Researchers in such fields as developmental psychology use longitudinal studies to study changes in individual or group behavior over an extended period of time by repeatedly monitoring the same subjects. In longitudinal... Read more
Ferungulata Ferungulata
Ferungulata (subclass Theria, infraclass Eutheria) A cohort, proposed on palaeontological grounds but regarded by some authorities as artificial, that includes the Carnivora (all of the modern mammalian carnivores), the primitive ungulates (including the elephants and sea cows), the Perissodactyla... Read more
Praetorians Praetorians
Praetorians , bodyguard of the ancient Roman emperors. Growing out of an early troop that served as bodyguard to the general commanding in Rome, they were formally organized in the time of Augustus. The number of cohorts (from 500 to 1,000 men each) forming the guard varied, but in the days of the... Read more
Toothed whales Toothed whales
Odontoceti (toothed whales; cohort Mutica, order Cetacea) A suborder of marine mammals that comprises ancestral forms, known from the Upper Eocene, and the four superfamilies: Squalodontoidea (extinct forms), Platanistoidea (river dolphins), Physeteroidea (large whales), and Delphinoidea (smaller... Read more
Ungulates Ungulates
Notoungulata (cohort Ferungulata, superorder Protoungulata) An extinct order of ungulates that, apart from one Lower Eocene representative from N. America and a well-established representative from the late Palaeocene of eastern Asia, are exclusively S. American. They flourished on that continent... Read more
Artiodactyls Artiodactyls
Artiodactyla (cohort Ferungulata, superorder Paraxonia) The even-toed ungulates, an order of mammals that includes the camels, pigs, and ruminants, together with numerous extinct varieties. They are the most successful of the hoofed animals. They are descended from the Condylarthra, and underwent a... Read more

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