• Age 18-40 years.
  • Residence in Athens for one year from the start of the program.
  • Personal and family history free of infectious, genetic or hereditary diseases.
  • High risk groups excluded.
  • Consistent participation and obligatory completion of the program.
  • Good health.
  • Regular visits to CRYOGONIA for the collection of specimens, requiring sexual abstinence of 3-4 days.
  • Exclusive collaboration with CRYOGONIA.