title: Response to Professor Olsen's commentary on 'random sampling - is it worth it?'.
authors.affiliation: School of Public Health, Yale University, New Haven, CT 06510, USA. michael.bracken@yale.edu
authors.forename: Michael B
authors.initials: MB
authors.lastname: Bracken
authors.forename: Irva
authors.initials: I
authors.lastname: Hertz-Picciotto
authors.forename: Michael R
authors.initials: MR
authors.lastname: Elliott
authors.forename: Donald J
authors.initials: DJ
authors.lastname: Dudley
authors.forename: Stephen
authors.initials: S
authors.lastname: Buka
authors.forename: James M
authors.initials: JM
authors.lastname: Robbins
authors.forename: Nigel
authors.initials: N
authors.lastname: Paneth
mesh_terms: D003625:Data Collection / Q000379:methods*; D006801:Humans; D012107:Research Design / Q000592:standards*