 The phenomenon is also found among oversea Chinese in Southeast Asia, especially Malaysia and Indonesia, and less frequently among the Malay and Indonesian inhabitants of the countries.Though there are speculations that the occurrence of koro among people in Malaysia and Indonesia was the result of Chinese migrants, this cultural diffusion view is challenged since koro epidemics have been reported in Thailand and India, involving masses of non-Chinese people.Sporadic cases of koro among people with non-Southeast-Asian ethnicity have been reported across the globe, for example, Nepali, Sudanese, Jordanian, Tanzanian, Nigerian, French, British, American and Canadian.