Assertion: ngf | /r/AtLocation | a culture medium of the kind
Facets:
value: preferably
type: DEGREE
Source sentences:
text: Preferably, the NGF is added to a culture medium of the kind suitable for the storage of corneas, or for the in vitro culture of corneal or conjunctival cells or tissues, in amounts comprised between 100 pg/ml and 200 ng/ml, optionally together with other nutrients and other biologically active agents.