[Various problems associated with inhalation spacers].
Nishima
Mitsuyoshi
M
Morikawa
Akihiro
A
D000280:Administration, Inhalation; D000336:Aerosols; D004304:Dosage Forms; D006801:Humans; D036503:Inhalation Spacers; D036501:Metered Dose Inhalers; D010599:Pharmacokinetics
D000336:Aerosols; D004304:Dosage Forms