This marking identifies the time when patients diagnosed at presentation with the disease started to exit the study due to natural causes: death, impossibility to follow up due to the low quality of life, and so on.
That would be, naturally, an impossibility.
On the continuing uncertainty surrounding Greece, Mr Barroso commented: "In a democracy, new elections are the natural consequence of the impossibility to form a government following an election.
His gliding, floating camera could make wild impossibilities look utterly natural.
Evidence of the role of matrix components of natural waters is presented and the impossibility of exporting kinetic constants to systems characterised by different molecular mechanics, mostly ignored in previous studies, is highlighted.
But his real interests are far more abstract: the nature of quests, the line between fable and fact, the distinction between the natural and the man-made worlds, and the impossibility of fully understanding one's place — to say nothing of a toy duck's — in relation to the universe.
Louis Agassiz, a great 19th century scientist now in the US Hall of Fame, thought social equality between black and white a "practical impossibility" and intermarriage "a perversion of every natural sentiment".
Say, if the assumption that all natural numbers have the property P leads to an impossibility, the existence of a number with the contrary property not-P can be inferred.
Currently, however, the natural course of RIS is largely unknown, with the impossibility of clarifying whether the observed changes reflect the earliest form of MS or something else, including a non-disabling form of MS [9].
The natural mechanism is not fully comprehended until now due to impossibility to carry out actual field experiments.
