title: Variability and sample size requirements for health-related quality-of-life measures: understanding the challenges facing investigators.
authors.forename: Corneel
authors.initials: C
authors.lastname: Coens
authors.forename: Andrew
authors.initials: A
authors.lastname: Bottomley
authors.forename: Fabio
authors.initials: F
authors.lastname: Efficace
authors.forename: Henning
authors.initials: H
authors.lastname: Flechtner
authors.forename: Neil
authors.initials: N
authors.lastname: Aaronson
mesh_terms: D006801:Humans; D009369:Neoplasms; D011788:Quality of Life; D015203:Reproducibility of Results; D018401:Sample Size; D011795:Surveys and Questionnaires