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Obtain dense, viable tissue. 

Do not use an electrocautery knife.

Do not place specimen in formalin or other fixative.

Avoid contamination. 

Avoid drying of the specimen.

Immediately place the specimen in fresh Weisenthal Cancer Group transport medium. 

Seal inner and outer transport vials securely. 

Keep specimen cool. 

Use a frozen cold pack. 

Do not freeze the specimen. 

Do not place ice pack in minus 70 freezer (minus 40 is acceptable). 

Do not use dry ice.

Transport specimen the same day it is collected.