Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleIs There Is or Is There Ain“t No Baby?: Dr. Shapiro Replies to Drs. Petitti and Greenland1.AuthorsShapiro, SamuelPublicationAmerican Journal of Epidemiology, 1994, Vol 140, Issue 9, p788ISSN0002-9262Publication typeArticle