title: Conservative handling of missing data.
authors.forename: Vance W
authors.initials: VW
authors.lastname: Berger
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000628:therapy*; D005260:Female; D006801:Humans; D018020:Lithium Compounds / Q000627:therapeutic use*; D008297:Male; D015233:Models, Statistical; D010352:Patient Dropouts / Q000706:statistics & numerical data*
chemical_list: D018020:Lithium Compounds