. 2019 Jun 18;69(4):1041–1065. doi: 10.3233/JAD-190050
© 2019 – IOS Press and the authors. All rights reserved
This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial (CC BY-NC 4.0) License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Fig.2.
Four phases of technology development.