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 E01 Diagnosis D003933 +
  E01.450 Laboratory Techniques and Procedures D003942 +
   E01.450.865 Specimen Handling D013048 +
    E01.450.865.366 Preservation, Biological D011309 +
     E01.450.865.366.156 Cryopreservation D015925 +
       E01.450.865.366.156.260 Freeze Drying D005612 +

 E05 Investigative Techniques D008919 +
  E05.200 Clinical Laboratory Techniques D019411 +
   E05.200.500 Cytological Techniques D003584 +
    E05.200.500.620 Histocytological Preparation Techniques D016591 +
     E05.200.500.620.760 Tissue Preservation D014021 +
      E05.200.500.620.760.160 Cryopreservation D015925 +
        E05.200.500.620.760.160.260 Freeze Drying D005612 +

 E05 Investigative Techniques D008919 +
  E05.200 Clinical Laboratory Techniques D019411 +
   E05.200.750 Histological Techniques D006652 +
    E05.200.750.600 Histocytological Preparation Techniques D016591 +
     E05.200.750.600.760 Tissue Preservation D014021 +
      E05.200.750.600.760.160 Cryopreservation D015925 +
        E05.200.750.600.760.160.260 Freeze Drying D005612 +

 E05 Investigative Techniques D008919 +
  E05.760 Preservation, Biological D011309 +
   E05.760.156 Cryopreservation D015925 +
     E05.760.156.260 Freeze Drying D005612 +