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Scientists
have been devoting
much
efforts
for
thousands
of
years
to
find
out
the
reason for human
aging
processes and
related
problems. Following
the
development of
molecular
pathology and
molecular
biology,
researches
on
the
aging related
problems
have
progressed
significantly.
Many
new
ideas existed
and can
be
categorized
into
the
following
,two
major groups:
(i)
determined
by
genetic
reasons
and;
(ii)
caused
by
the accumulated harmful
effects
over
the
human
organisms. These
tvvo
groups
of
ideas
explained
the
reason for aging
from both
macro
and
micro
point
of
view, continuing the study on aging and related morbidities
such
as
Parkinson's disease
and Alzheimer's
disease
and other
senile
mental deterioration.
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