Examlex
Find a group that is a ortho,para director in electrophilic aromatic substitution.
Patterns of Disease
The occurrence and distribution of diseases within a population over time, influenced by genetic, environmental, and lifestyle factors.
20th Century
The period from January 1, 1901, to December 31, 2000, marked by significant global events, technological advances, and cultural shifts.
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Patterns and changes over time in the occurrence, prevalence, or incidence of diseases within populations.
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