title: Use of surrogate markers.
authors.affiliation: Division of Therapeutic Biological Internal Medicine Products, Center for Drug Evaluation and Research, FFDA, Rockville, MD 20852, USA.
authors.forename: Marc K
authors.initials: MK
authors.lastname: Walton
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000175:diagnosis* / Q000503:physiopathology; D015415:Biomarkers / Q000032:analysis; D004558:Electric Stimulation / Q000379:methods; D019054:Evoked Potentials, Motor / Q000502:physiology*; D006801:Humans; D018482:Muscle, Skeletal / Q000503:physiopathology; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013997:Time Factors
chemical_list: D015415:Biomarkers