NRG-1|Neuregulin 1|Heregulin-1|HGL|HRG1-alpha|HRG1-beta 1|NRG1|ARIA|GGF2|GGF|glial growth factor|HGLneu differentiation factor|HRG|HRG1|HRGA|neuregulin 1 type IV beta 1a|MST131|MSTP131|NDFheregulin|alpha|45kD|ERBB2 p185-activator|neuregulin 1|neuregulin 1 type IV beta 3|pro-neuregulin-1|membrane-bound isoform|pro-NRG1|sensory and motor neuron derived factor|SMDF