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Fig 1.

Summary of methods and objectives of the study.

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Fig 2.

Graphic representation of a generic pH strips and colour scale for NG-tube placement.

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Table 1.

Demographic data of interviewees.

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Fig 3.

Co-designed process of use of hydrophilic NG-tube and pH strips to check the tube position.

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Table 2.

Demographic characteristics of participants.

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Table 3.

Scenario and percentage of errors in reading the strips during the discrimination test.

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Fig 4.

Percentage of errors in the discrimination test.

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