title: [Clinical trials. Some general ethical questions].
abstract: This article provides an overview of the main problems that ethics committees deal with when analysing clinical trials. Some characteristics of the different phases are discussed as well as some particular problems of the Portuguese law.
authors.affiliation: Comissão de Etica para a Saúde, Instituto Português de Oncologia, Lisboa.
authors.forename: J A
authors.initials: JA
authors.lastname: Melo
mesh_terms: D002986:Clinical Trials as Topic / Q000331:legislation & jurisprudence / Q000592:standards*; D004992:Ethics, Medical; D006801:Humans; D007258:Informed Consent / Q000331:legislation & jurisprudence; D011174:Portugal