Genetic and environmental influences on blood pressure and physical activity: a study of nuclear families from Muzambinho, Brazil - Forjaz, Cláudia Lúcia de Moraes; Bartholomeu, Teresa; Rezende, J. A. S; Oliveira, Jorge Alberto de; Basso, Luciano; Tani, Go; Prista, António; Maia, J. A. R (Brazilian Journal of Medical and Biological Research, 2012)