RT Journal Article SR Electronic T1 Increased formation of preganglionic synapses and axons due to a retrograde trans-synaptic action of nerve growth factor in the rat sympathetic nervous system JF The Journal of Neuroscience JO J. Neurosci. FD Society for Neuroscience SP 1501 OP 1510 DO 10.1523/JNEUROSCI.03-07-01501.1983 VO 3 IS 7 A1 T Schafer A1 ME Schwab A1 H Thoenen YR 1983 UL http://www.jneurosci.org/content/3/7/1501.abstract AB