Sporadic A Izheimer’s disease

S-A(A-A) missile

section a-a a-a

section s-s s-s

Hirschsprung’s disease sporadic

A-A-A conjugation structure

Ne two rk c o mp a s s

A.A.A.

C.A.A.S.

A.S.A.P As Soon As Possible

SⅠSⅡSⅢ syndrome

late-onset sporadic Parkinson’s disease

Sporadic alzheimer’s disease

sporadic disease

sporadic Parkinson’s disease sPD

a disease one is shamed of

A S T

A/s

A+A^2O process

A-1A