title: [Letter concerning the article: Drug surveillance: concepts, objectives, and methods (1992; 11:595-602)].
authors: J A
authors: JA
authors: da Silva
mesh_terms: D011174:Portugal; D011358:Product Surveillance, Postmarketing / Q000379:methods
vernacular_title: Carta relativa ao artigo: Farmacovigilância: conceitos, objectivos e métodos (1992; 11:595-602).