by using quantitative autoradiographic techniques , receptors for insulin-like growth factor i ( igf-i ) and epidermal growth factor ( egf ) were analyzed in 13 samples of human brain tumors ( 4 low grade astrocytomas , 7 glioblastomas , 1 anaplastic ependymoma and 1 medulloblastoma ) .
C0242275
epidermal growth factor
C0086418
human