“…The most commonly reported environmental factors include: viruses, . such as those that cause mumps, Coxsackie infections, cytomegalovirus infections, and rubella (Kemper, 1947;Forrest et al, 1971;Sultz et al, 1975;Yoon et al, 1979Yoon et al, , 1987aGamble et al, 1984;Ginsberg-Fellner et al, 1985;Helmke et al, 1986;Loria et al, 1986;Banatuala, 1987;Harris, 1987;Rayfield and Ishmura, 1987;Pak et al, 1988;Suenaga and Yoon, 1988;Ciampolillo et al, 1989); environmental toxins, such as Alloxan, streptozotocin, Vacor, and nitrosamines (Karam et al, 1980;Helgason and Jonasson, 1981;Bouchard et al, 1982;Helgason et al, 1982); arsenic (Lai et al, 1994); diazoxide and corticosteroids (Ferner, 1992); nutrients, such as foods containing N-nitroso compounds (Helgason et al, 1982); and stress (Drash, 1990). …”