title: BEIR IV report.
abstract: In the Research News article by Richard A. Kerr "In search of elusive little comets" (10 June, p. 1403), the position held by John Craven of the University of Iowa was incorrectly given. He is a senior research physicist.
authors.forename: W H
authors.initials: WH
authors.lastname: Ellett
mesh_terms: D000367:Age Factors; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology*; D008297:Male; D009381:Neoplasms, Radiation-Induced / Q000209:etiology*; D011886:Radon / Q000009:adverse effects*; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*
chemical_list: D011886:Radon