1. Results of routine patch testing of 200 patients in Toronto, Canada;Nethercott;Contact Dermatitis,1982
2. Contact dermatitis in the west of Scotland;Husain;Contact Dermatitis,1977
3. Statistical and comparative study of 4600 patients tested in Barcelona (1973-1977);Romaguera;Contact Dermatitis,1980
4. Epidemiology of contact allergy in Singapore;Gob;Int J Dermatol,1988
5. American Academy of Dermatology, North American Contact Dermatitis Group. Unpublished data. 1987-1988.