A Generalization of Chao's Estimator for Covariate Information.Published in:Biometrics, 2013, v. 69, n. 4, p. 1033, doi. 10.1111/biom.12082By:Böhning, Dankmar;Vidal‐Diez, Alberto;Lerdsuwansri, Rattana;Viwatwongkasem, Chukiat;Arnold, MarkPublication type:Article