This tactile feedback is related to a difference in tis-sue density as one goes from the parenchyma to the vessels or from the parenchyma to the collecting sys-tem, and also to the selectivity of the CUSA to spare tissue of high collagen content.
1 In the least developed countries, the overall illiteracy rate is 49 percent. 2  52 percent of all non-literates live in India and China. 3  Africa as a continent has a literacy rate of less than 60 percent. 4  In Sub-Saharan Africa since 1980, primary school enrollment has declined, going from 58 percent to 50 percent.
| Ancestry.com. * According to Ancestry.com, the average African American is 65 percent sub-Saharan African, 29 percent European and 2 percent Native American.* According to 23andme.com, the average African American is 75 percent sub-Saharan African, 22 percent European and only 0.6 percent Native American.