No one even knows the true number of species in the world, they say.

The agency also says the true number of cases is almost certainly far higher.

But when three had passed, he began to wonder whether the true number might be four.

However, the true number of species is difficult to determine.

Military officials here say the units field 15,000 soldiers, but their true number appears to be 8,000 at best.

No one, though, had any real idea of the true number.

It is thought that the true number across all eight hospitals will be more than 200.

Although the group claims more than 10,000 members, others say the true number is about half that.

The true number likely was in the hundreds of thousands.

Indeed, some believe that the true number runs into the thousands.