GDNF: a potent survival factor for motoneurons present in peripheral nerve and muscle. - Henderson CE; Phillips HS; Pollock RA; Davies AM; Lemeulle C; Armanini M; Simmons L; Moffet B; Vandlen RA; Simpson LC corrected to Simmons L; Koliatsos VE; Rosenthal A (Science (New York, N.Y.), 1994)