. . . . . . "The chimera will share at least one biological property in common with CHF. The second protein will typically be a cytokine, growth factor, or hormone such as growth hormone, IGF-I, or a neurotrophic factor such as CNTF, nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin-3 (NT-3), neurotrophin-4 (NT-4), neurotrophin-5 (NT-5), etc." .