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30 dic 1956 anni - Richard Doll and Bradford Hill publish their study of lung cancer

Descrizione:

The same time that the percentage of smokers in the American population reached its all time peak (45%)

Aggiunto al nastro di tempo:

Cancer History

25 set 2017

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630

Data:

30 dic 1956 anni

Adesso

~ 68 years ago

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