User talk:2601:1C0:5401:90D0:40F9:1E48:69E3:14F6

I was in search of the barbaric methods that were practised in the sixties on children who were told they suffered from allergies, I do remember a test where the nurse takes a razor blade and places forty slits into the child's back then take a drop of the allergen and places it into the razor cut that she made in the child's back, what was the medical term for that test? Does anybody know?