Key input parameters and numerical values corresponding to the South African scenario, for the year 2007.

The same assumptions were used for other countries and settings, except for the country-specific parameters given in Table 1 and for unit costs adjusted to reflect differences in gross domestic product per capita (see text).AE = author's estimates.*A range of x% for a parameter of a value v indicates that the range in which this parameter was varied from v(1?x) to v(1+x).