Table 1. External Parameters Used in the Models.

Parameters	Min	Base-Case Value(s)	Max	Source
Rate of HIV transmission from infected male to female	0.0001	0.001	0.02	(27-43)
Rate of HIV transmission from infected female to male	0.003	0.005	0.0082	(27, 28, 40, 44)
Rate of HIV transmission from infected male to male (insertive anal intercourse)	0.0003	0.005	0.032	(27, 39-41, 45, 46)
Rate of HIV transmission from infected male to male (receptive anal intercourse)	0.003	0.006	0.009	(27, 39, 40, 44, 45, 47)
Rate of HIV transmission via shared injection	0.0029	0.01	0.033	(48-51)
Condom efficacy	0.35	0.9	0.95	(52)
HIV prevalence among Iranian IDUs	0.012	0.2	0.63	(51)
HIV prevalence among sex workers in Iran	-	0.05	-	(51)
Cost of each HIV positive care per month in Iran ($)	299	922.4	1236.1	(48)