Open Discussion on Marijuana Use (September 11, 2020) E3 Summit March 5, 2021 cbdnews Marijuana Medical Benefits Comments Off on Open Discussion on Marijuana Use (September 11, 2020) E3 Summit Presented by Jordan Tishler, MD, Harvard Medical School. For more information, please visit Marfan.org. Medical questions can be submitted to Marfan.org/Ask.