Content. In this unit you must apply the knowledge of unit 1 and apply to the critical reading of a randomized clinical trial and a meta-analysis or systematic review of the literature article. Students will be provided them an article consisting of a clinical trial scientist and another on a meta-analysis or systematic review of the literature. The subject of articles depends on the specialty and/or preference of the student. Students undertake reading critical and scientific articles two low tutoring of a Professor of the Master that will be assigned according to the specialty and the preference of the student.