Risk factors for ER visits due to asthma exacerbations in patients enrolled in a program for the
control of asthma and allergic rhinitis in Feira de Santana, Brazil
Heli Vieira Brandão, Constança Sampaio Cruz, Murilo Cerqueira Pinheiro, Edgar Adolfo Costa,
Armênio Guimarães, Adelmir Souza-Machado, Álvaro Augusto Cruz