After graduation students can take postgraduate courses being these latu sensu or stricto sensu. Latu sensu graduate degrees are specializations and refinements lasting one to two years and do not confer academic title. At the end of the course the student must present a course completion work. (Example of latu sensu: MBA, specialization, medical residency, among others). Graduate degrees stricto sensu are courses that confer academic title. After graduation, the student must do a master's degree with a duration of two years and after that period present a master's thesis. If it is approved by the examining board, it will receive the master's degree. The doctorate course in Brazil is the most academic degree course. In order to study this postgraduate course it is necessary to have the title of Master. The doctorate has a duration of four years and must be unpublished. After four years of course the student will present the doctoral thesis to an assessment bank, if approved will receive the title of Doctor.