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Coffee's consommation

Dear Sir or Madam, please take a few minutes of your time to complete the following questionnaire.

Secured
Coffee's consumption
1

How often do you drink coffee ?

Select one or more answers
Coffee's consumption
2

When you take coffee, do you sleep normally ?

Select one or more answers
Coffee's consumption
3

What time do you sleep when you don't drink coffee ?

Coffee's consumption
4

What time do you sleep when you drink coffee ?