The city of Belem in northern Brazil has a population of about 2,000,000.聽 It would be very interesting to find out if its inhabitants have an unusually low incidence of illnesses such as cancer,...
The city of Belem in northern Brazil has a population of about 2,000,000.聽 It would be very interesting to find out if its inhabitants have an unusually low incidence of illnesses such as cancer,...
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