Expression of GFRa-1, GFRA-2, and c-Ret mRNAs in rat adrenal glandSchober, A.; Arumäe, Urmas; Saarma, Mart; Unsicker, K.Journal of neurocytology2000 / p. 209-213 Glial cell line-derived neurotrohic factor rescues target-deprived sympathetic spinal cord neurons but requires transforming growth factor-beta as co-factor in vivoSchober, A.; Hertel, R.; Arumäe, Urmas; Farkas, L.; Jaszai, J.; Krieglstein, K.; Saarma, Mart; Unsicker, K.Journal of neuroscience1999 / p. 2008-2015