title: Change is the only constant.
authors.affiliation: UCLA, USA. rweiss@memnet.org
authors.forename: Rhoda
authors.initials: R
authors.lastname: Weiss
mesh_terms: D000329:Advertising / Q000639:trends; D006293:Health Promotion / Q000379:methods* / Q000639:trends; D006801:Humans; D008389:Marketing of Health Services / Q000639:trends*; D010506:Periodicals as Topic