Gender

Age

Pre-op

6 mo-post

2 yr-post

Wang

F

53

III

II

II

Huang

M

31

III

I

I

Cui

M

72

III

II

I

Ren

M

62

III

I

I

Song

M

60

IV

II

II

Zhou

M

53

III

II

I

Wang

M

68

II

I

I

Che

M

60

III

I

I

Du

M

60

IV

II

II

Zhang

M

64

III

II

I