R1.m.2: clarify interpretation of ART impacts highest when KP prioritized

[jessexknight]

Page 17: "Our ecological analysis also suggested that the anticipated ART prevention impacts from homogeneous models may be achievable in the context of risk heterogeneity if testing/treatment resources are prioritized to higher risk groups." I didn't follow this - what is this based on? The comparison of the 21% vs 10% on p. 15? If so, aren't the numbers too small to suggest a statistically significant difference? (See my earlier comment on testing for significant differences.)