Factors associated with the prevalence of hypertension and control practices among elderly residents of São Paulo city, Brazil - Mendes, Telma de Almeida Busch; Goldbaum, Moisés; Segri, Neuber José; Barros, Marilisa Berti de Azevedo; Cesar, Chester Luiz Galvão; Carandina, Luana (Cadernos de Saúde Pública, 2013)