But there is another important factor, which is freedom.
"We don't speak about [defecation], there's a shame factor which is horrible.
But Vincke touched on another key factor, which is absent from the Broadly article: women's agency.
"It could be that Zika is causing [microcephaly] with another factor, which is definitely possible.
The player himself apparently prefers a move to Old Trafford: a factor which is likely, ultimately, to prove decisive.
A secondary factor, which is more specific to the industry, is the tiered structure of automotive marketing.
Brilliant writing for newspapers has a plus factor which is hard to define and is not achieved by many.
There's another factor, which is that I've got to test my team a little bit.
Researchers hoped the gene would start making the growth factor, which is the body's natural substance to make blood vessels grow.
We need something to focus all our national musical excitement around, something other than The X Factor, which is not about music, but entertainment.
On Tuesday night, Trump was on "The O'Reilly Factor," which is still the most popular show on the Fox News network.
