Influence of oscillating positive expiratory pressure and the forced expiratory technique on sputum cell counts and quantity of induced sputum in patients with asthma or chronic obstructive pulmonary disease.
Ana Lúcia Bernardo de Carvalho Morsch, Maria Marta Amorim, Andréa Barbieri, llka Lopes Santoro, Ana Luisa Godoy Fernandes