title: Re: "Possibility of selection bias in matched case-control studies using friend controls".
authors.forename: M C
authors.initials: MC
authors.lastname: Pike
authors.forename: J
authors.initials: J
authors.lastname: Robins
mesh_terms: D004812:Epidemiologic Methods; D006801:Humans; D012107:Research Design; D013223:Statistics as Topic