1. Catherine O’Hara’s cause of death was a blood clot in her lungs, officials say  The Journal
  2. Catherine O’Hara’s cause of death revealed  RTE.ie
  3. Actor Catherine O’Hara died of a blood clot in her lungs, death certificate says  The Guardian
  4. Catherine O’Hara cause of death confirmed as pulmonary embolism  BBC
  5. Home Alone actress Catherine O’Hara’s cause of death confirmed  Sky News