1.   Many questions about fatal familial insomnia remain.

2.   Others, like Creutzfeldt-Jakob disease and fatal familial insomnia, are exceedingly rare diseases of humans.

3.   Their hunch that mad cow disease and fatal familial insomnia were somehow connected would turn out to be right.

4.   Researchers discover new form of fatal insomnia.

5.   Scientists had prior indications that the inherited fatal insomnia was among the half-dozen human brain diseases caused by the prion protein.

6.   That confirms the idea that the disease, called fatal familial insomnia, belongs to a small group of neurological disorders caused by an abnormal protein called a prion.