of;
Obstetrics;
and;
Gynecology,;
General;
Hospital;
of;
PLA,;
Beijing;
100853,;
China;
Cell;
and;
Regenerative;
Medicine;
Lab,;
Beijing;
Institute;
of;
Transfusion;
Medicine,;
Academy;
of;
Military;
Medical;
Sciences,;
Beijing;
100850,;
China;