Historical clue formulations

• Obsession — 2016-09-08
• Obsession — 2015-12-08
• Preoccupation — 2014-09-06
• Thought one can't shake — 2011-03-26
• Possible psychotic symptom — 2004-02-06
• Obsession — 2000-01-14
• Obsession — 1994-08-13