A patient sensitized by buffalo-hide sandals, made in East India, later developed a contact dermatitis to the leather lining of an American-made shoe. This leather lining also originated in India. The offending agent was probably a vegetable tannin.
Minkin W, Cohen HJ, Frank SB. Contact Dermatitis to East Indian Leather. Arch Dermatol. 1971;103(5):522-523. doi:10.1001/archderm.1971.04000170056015