title: Proper stratification of survival curves by level of gross motor function.
authors.affiliation: Mortality Research and Consulting Inc, Newport Beach, CA, USA.
authors.forename: Steven M
authors.initials: SM
authors.lastname: Day
mesh_terms: D002547:Cerebral Palsy / Q000453:epidemiology* / Q000401:mortality*; D002658:Developmental Disabilities / Q000453:epidemiology* / Q000401:mortality*; D005260:Female; D006801:Humans; D008297:Male