title: Quantitative in vitro studies on the nerve growth factor (NGF) requirement of neurons. I. Sympathetic neurons.
mesh_terms: D000818:Animals; D001769:Blood; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D002642:Chick Embryo; D003470:Culture Media; D004305:Dose-Response Relationship, Drug; D005725:Ganglia, Autonomic / Q000187:drug effects*; D009414:Nerve Growth Factors / Q000494:pharmacology*; D009474:Neurons / Q000187:drug effects / Q000648:ultrastructure
chemical_list: D003470:Culture Media; D009414:Nerve Growth Factors