Overcoming difficulties in the introduction of a summative assessment of clinical competence in a Brazilian Medical School - Troncon, Luiz Ernesto de Almeida; Rodrigues, Maria de Lourdes Veronese; Piccinato, Carlos Eli; Figueiredo, José Fernando de Castro; Peres, Luiz César; Cianflone, Ana Raquel Lucato (Advances in Medical Education, 1997)