The growing competition in Brazilian science: rites of passage, stress and burnout. L. de Meis, A. Velloso, D. Lannes, M.S. Carmo and C. de Meis. Brazilian Journal of Medical and Biological Research, 36 (9): 1135, 2003.
Figure 2. Young population. Number of 18- to 30-year-olds in Brazil, USA, UK, France and Germany. Source: United Nations Population Division, World population prospect, Population database.