Table 1

Score	Positivity	Score	Intensity
0	< 1.0%	0	No staining (negative)
1	1 – 10%	1	Faint brown (mild-weak)
2	10 – 50%	2	Brown (moderate)
3	> 50%	3	Deep brown (strong)

Table 1: Scoring system for quantifying the level of P53, Bax and Bcl-2 expression in epidermal keratinocytes (Liang et al. 1999).