Noncompliance to prescribed-as-needed (PRN) medication use in asthma: usage patterns and patient characteristics.
D000328:Adult; D001249:Asthma / Q000188:drug therapy* / Q000523:psychology; D001294:Attitude to Health; D005260:Female; D006801:Humans; D008297:Male; D010349:Patient Compliance; D012646:Self Administration / Q000523:psychology