title: Commentary: Smoking, birthweight and mortality: Jacob Yerushalmy on self-selection and the pitfalls of causal inference.
authors.affiliation: Tobacco Control Research Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD 20892-9761, USA. E-mail: paramark@mail.nih.gov.
authors.forename: Mark
authors.initials: M
authors.lastname: Parascandola