A simple method for censored age-of-onset data subject to recall bias: mothers' reports of age of puberty in male twins.
Pickles A, Neale M, Simonoff E, Rutter M, Hewitt J, Meyer J, Crouchley R, Silberg J, Eaves L. A simple method for censored age-of-onset data subject to recall bias: mothers' reports of age of puberty in male twins. Behav Genet. 1994 Sep; 24(5):457-68.