• Samir Johna, MD. "George M. Abouna: The History of a Pioneer in Transplant Surgery." 71st Assyrian National Convention. San Jose, California (09/2004)
  • Samir Johna. "Medical aid to Iraqi Assyrian children - Guest Speaker at the Presidential dinner.." 74th Assyrian National Convention, August 30th-September 2nd, 2007. San Diego, California (09/2007)
  • Samir Johna. "Medical aid to Assyrians and Christians of Iraq: Past, present, and future.." Narsai's Taste of the Mediterranean - Fund raising for the Assyrian Aid Society of America. San Francisco, California - Guest speaker (11/2007)