[Multiple dose devices = positive].
D001249:Asthma / Q000188:drug therapy / Q000451:nursing*; D001291:Attitude of Health Personnel; D003625:Data Collection; D006801:Humans; D008511:Medicine; D036501:Metered Dose Inhalers / Q000592:standards*; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy / Q000451:nursing*; D013038:Specialization