The first alternative C-R function is based on the relative risk of 1.16 from the Fine Particles Alone, Regional Adjustment Random Effects model reported in Table 46 of the HEI report.
The first alternative C-R function is based on the relative risk from fine particles.
The first alternative C-R function is based on the relative risk from large  particles.
Whether Congress and the Administration can agree on a definition is unimportant.
Two friends are having fun.
I saw that and thought I was finally safe!
Two photographers are sword fighting one another.
The two siblings are hugging.
Kemp politely asked for a diet coke.