Possible unanticipated protective effects of agents: An additional reason for using both normal and malformed controls in case-control studies of birth defects

TeratologyVolume 62, Issue 6 p. 373-373 Letter to the Editor Possible unanticipated protective effects of agents: An additional reason for using both normal and malformed controls in case-control studies of birth defects Ernest B. Hook, Corresponding Author Ernest B. Hook [email protected] School of Public Health, University of California, Berkeley, Berkeley, California Department of Pediatrics, University of California, San Francisco,...