Defaut sanatorium. Gustav Mahler and Dr. Jean-Joseph Defaut (1852-1929) in Illustriertes Wiener Extrablatt, 28-04-1911.
- Profession: Doctor of Medicine.
- Residences: Defaut sanatorium, Neuilly-sur-Seine, Paris, France.
- Relation to Mahler: Year 1911, Health.
- Correspondence with Mahler:
- Born: 07-04-1852 Confolens, France.
- Died: 1929
- Buried: Unknown.
