AUTHOR=Sigurdsson Einar M. TITLE=Alzheimer's Disease: Challenges Ahead JOURNAL=Frontiers in Psychiatry VOLUME=1 YEAR=2010 URL=https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2010.00005 DOI=10.3389/fpsyt.2010.00005 ISSN=1664-0640