WESTLAKE VILLAGE, Calif., May 21, 2019 (GLOBE NEWSWIRE) -- Sienna Biopharmaceuticals, Inc. (Nasdaq:SNNA), a clinical-stage biopharmaceutical company, today announced that Paul F. Lizzul, M.D., Ph.D., Chief Medical Officer, and Silvio Traversa, B.Sc., Ph.D., Chief Scientific Officer, are scheduled to present at the Dermatology Drug Development Summit Europe, May 21-23, 2019, in Frankfurt, Germany. Dr. Lizzul also serves as the Summit’s Chair. About the Presentations Title: “Bridging the...