[lemma=□] □
[lemma=rare] □
Though the serious incident with a test which produced extreme reactions this week is extremely rare - it begs the question as to why young and healthy people like students are used to test drugs probably intended for older and less healthy people ? But catatonia in someone with no previous psychiatric history was extremely rare - - yet what else could explain this condition ? " Bush / Cheney04 " very rare - in a place with more pickups than cars . Though HGPS is rare - - only about 100 cases have been reported since it was first described in 1886 , with fewer than 40 now living - - it 's one of the hot spots of genetic research , for the obvious reason that it could help us discover why we age and , conceivably , how to stop . ( Such bodies are rare - - all are comets whose orbits have been perturbed by planets during their most recent passage through the solar system to put them on an escape trajectory .