> Heidelberg [...] not a lot of variation in the patients' ethnicity You'd be surprised. There might not be a lot of black people but Heidelberg is a universit

> Heidelberg [...] not a lot of variation in the patients' ethnicity You'd be surprised. There might not be a lot of black people but Heidelberg is a university town and rather diverse. 27% are ethnic minorities, though only maybe 1% are black (4% Asian, 4% Russian/CIS, 3% southern Europe, 3% Turkey, 2% US-American, 2% Latin American, 2% Polish, 2% ex-Yugoslav)