- Photos
- Individual photos.
- Photo collections.
- CINP Collection 1st International Congress (1958).
- 2nd International Catecholamine Symposium (1965).
- American Academy of Arts and Sciences. The Neural Properties of Biogenic Amines (1966).
- Symposium on Pharmacology, Toxicology and Abuse of Psychoromimetics Collection (1968).
- Workshop Second Neuroscience Research Program (1968)
- CIBA Foundation Symposium Monoamine Oxidse and Its Inhibition (1975).
- XI National Congress of Neurology, Psychiatry and Mental Health (1973).
- The Croc Foundation Conference on GABA (1975).
- Dahlem Workshop (1982).
- British Association for Psychopharmacology Meeting, July 1985.
- 1st International Conference on New Directions in Affective Disorders, in Jerusalem in 1987.
- American College of Neuropsychopharmacology Annual Meeting.
- International Congress of Psychopathology of Expression and Brazilian Congress of Psychopathology of Expression (1988).
- ACNP Collection (1992).
- Fifth International Amine Oxidase Workshop (1992).
- World Federation of Societies of Biological Psychiatry Regional Meeting (1992)
- 1st International Symposium of Biological Psychiatry (1994).
- 2nd International Conference on New Directions in Affective.
- World Federation of Societies of Biological Psychiatry (1995).
- ACNP Meeting held in San Juan, December 1996.
- 5th International Congress of the Argentine Association of Psychiatrists (1996).
- CINP Congress held in Washington.
- Annual Meeting of Argentine Psychiatrists (1996).
- XXth CINP Congress (1996).
- Symposium “100 Years of Dementia Praecox" (1996).
- Charles E Smith Memorial Lecture held in Jerusalem April 1996.
- American College of Neuropsychopharmacology (1997).
- 6th World Congress of Biological Psychiatry (1997).
- Regional Symposium of the World Psychiatric Association (1997).
- Word Congress on Deoressive Disorders in Mendoza, Argentina 1997.
- CINP Collection (1998).
- BAP Collection 25th Aniversary Meeting (1999)
- 8th International Congress of Psychiatry, organized by the Argentine Association of Psychiatrists (2000).
- CINP Collection XXIInd International Congress (2000).
- 7th World Congress of Biological Psychiatry (2001).
- WPA Thematic Conference in Hormones, Drugs and Neuropsychopharmacology (2000).
- U.S. Israel Conference on Academic Psychiatry, Jerusalem, 2001..
- CINP Collection Regional Meeting Budapest (2001).
- CINP Collection XXIIIrd International Congress (2002).
- 10th International Meeting of Psychiatrists of the Argentine Psychiatric Association (2002).
- Association for Convulsive Therapy (ACT) annual meeting held June 2003 in San Francisco.
- CINP XXIVth International Congress (2004).
- 1st International Congress of Biological Psychiatry (2004).
- VIIth Congress of Biological Psychiatry (2005).
- 5th Latin American Congress of Neuropsychopharmacology (2005).
- 8th World Congress of Biological Psychiatry (2005).
- 4th Annual Meeting of the Danish University Antidepressant Group (2009). Per Bech, Lars Gram, Gene Paykel and Per Vestergaard
- VII Congress of the Latin American Federation of Biological Psychiatry (2011).
- 30th World Federation of Societies in Biological Psychiatry (2012).
- ACNP Annual Meeting (2012).
- World Congress for Psychiatric Genetics held in Toronto in 2015.
- XVII World Congress of the World Psychiatric Association, held jointly with the German Association of Psychiatry, Psychotherapy and Neurology Congress in 2017..
World Federation of Societies of Biological Psychiatry Regional Meeting (1992)
- Helmut Beckman, Ana Drach and Gerd Huber received from Carlos Hojaij
- Henri Dufour, Carlos Hojaij and Gerd Huber received from Carlos Hojaij.
- Helmut Beckman, Roberto Fernandez Labriola, Jorge Nazar, Carlos Hojaij, Alberto Monchablon and Hans Jürgen Möller