Table 2 Visual skin-response scoring system (Robinson et al, 1998)

From: Singlet oxygen luminescence as an in vivo photodynamic therapy dose metric: validation in normal mouse skin with topical amino-levulinic acid

Score

Observation

0

No observable effect

1

Mild erythema

2

Moderate erythema

3

Strong erythema

4

Dry desquamation

5

Thin scab formation

6

Thick scab formation

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