Amarantus Completes Tender Exchange of Convertible Securities; CEO attending CNBC's Healthy Returns conference in New York City SAN FRANCISCO, March 28, 2018 (GLOBE NEWSWIRE) -- Via OTC PR Wire -- Amarantus Bioscience Holdings, Inc. (OTC Pink:AMBS) (the "Company" or AMBS), a US-based biotechnology holding company with...