Correction: Transition to universal primary health care coverage in Brazil: Analysis of uptake and expansion patterns of Brazil’s Family Health Strategy (1998–2012)

• Monica Viegas Andrade, 
• Augusto Quaresma Coelho, 
• Mauro Xavier Neto, 
• Lucas Resende de Carvalho, 
• Rifat Atun, 
• Marcia C. Castro