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Table 1 Study profile

From: Studying the effectiveness of activated carbon R95 respirators in reducing the inhalation of combustion by-products in Hanoi, Vietnam: a demonstration study

Day

Group ABBA

Group BAAB

Friday

Evening urine

Evening urine

Weekend

No intervention

No intervention

Monday

Wear respirator

No respirator

Tuesday

Wear respirator, evening urine

No respirator, evening urine

Wednesday

No intervention

No intervention

Thursday

No respirator

Wear respirator

Friday

No respirator, evening urine

Wear respirator, evening urine

Weekend

No intervention

No intervention

Monday

No respirator

Wear respirator

Tuesday

No respirator, evening urine

Wear respirator, evening urine

Wednesday

No intervention

No intervention

Thursday

Wear respirator

No respirator

Friday

Wear respirator, evening urine

No respirator, evening urine