The intensity of any visual signs of irritation was recorded according to Dermal response score: 0=No evidence of irritation, 1=Minimal erythema; barely perceptible, 2=Definite erythema, readily visible; or minimal edema; or minimal popular response, 3=Erythema and papules, 4=Definite edema, 5=Erythema, edema, and papules, 6=Vesicular eruption, and 7=Strong reaction spreading beyond test site. Dermatologist also provided a superficial irritation score if the dermal response score >0. Superficial irritation score was as follow: grade A/score 0=Slight glazed appearance, grade B/score 1=Marked glazing, grade C/score 2=Glazing with peeling and cracking, grade F/score 3=Glazing with fissures, grade G/score 3=Film of dried serous exudate covering all or portion of the patch, and grade H/score 3=Small petechial erosions and/or scabs. The combined score was equal the sum of the dermal response score plus the numerical equivalent of the superficial irritation score. Full range 0-10.