Table 1: The results of patch testing (ICDRG criteria).
| Test materials | 48 hours | 72 hours |
| Moisturizing gel | + | ⧺ |
| Sesquiterpene lactone mix 0.1% pet | ⧺ | ⧺ |
| Alantolactone 0.1% pet | - | - |
| The extract of Tanacetum parthenium | ⧺ | ⧺ |
+: Weak positive reaction, Palpable erythema, infiltration, possibly papules; ⧺: Strong positive, Erythema, infiltration, papules, vesicles.