Historical clue formulations

• Sound heard through a stethoscope — 2005-11-27
• Breathing abnormality — 2004-07-23
• Rough breathing — 2002-02-10
• Breathing sound — 1999-09-26
• Bronchial sound — 1996-08-17
• Chest rattle — 1994-04-18
• Smoker's sound — 1993-12-14