San Diego, CA -- (SBWIRE) -- 05/30/2012 -- An investigation on behalf of investors of NASDAQ:AEZS shares over possible securities laws violations by AEterna Zentaris Inc. (USA) was announced and NASDAQ:AEZS stockholders should contact the Shareholders Foundation. Read the full press release at http://www.sbwire.com/press-releases/aeterna-zentaris-inc-usa-nasdaqaezs-investor-alert-investigation-over-potential-violations-of-securities-laws-145573.htm