of;
Ophthalmology,Zhuhai;
People’s;
Hospital;
Third;
Affiliated;
Hospital;
of;
Jinan;
University;
of;
Ophthalmology,the;
First;
Affiliated;
Hospital;
of;
Jinan;
University;
of;
Ophthalmology,Affiliated;
Anhui;
Provincial;
Hospital;
of;
Anhui;
Medical;
University;
of;
Ophthalmology,the;
First;
Hospital;
of;
Nanchang;
Third;
Affiliated;
Hospital;
of;
Nanchang;
University;
cryopreservation; human; umbilical; vein; endothelial; cells; slow; equilibrium; cooling; directional; freezing;