title: Re: Ecologic studies--biases, misconceptions, and counterexamples.
authors.forename: S
authors.initials: S
authors.lastname: Richardson
authors.forename: C
authors.initials: C
authors.lastname: Guihenneuc-Jouyaux
authors.forename: V
authors.initials: V
authors.lastname: Lasserre
mesh_terms: D015982:Bias; D015986:Confounding Factors, Epidemiologic; D003627:Data Interpretation, Statistical; D004463:Ecology