Hearing tactics: the long-term effects of instruction.
D000368:Aged; D005260:Female; D006309:Hearing; D006310:Hearing Aids / Q000706:statistics & numerical data*; D034381:Hearing Loss / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D010353:Patient Education as Topic / Q000191:economics / Q000592:standards*