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Fig 1.

Autofluorescence pictures.

(A) Tongue presenting with porphyrin autofluorescence. (B) Tongue not presenting with porphyrin autofluorescence.

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Fig 2.

Flow-chart.

Study protocol flow-chart.

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Fig 2 Expand

Table 1.

Demographic and statistical data of the study.

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Table 1 Expand