. Author manuscript; available in PMC: 2024 Jul 16.
Published in final edited form as: Prog Nucl Magn Reson Spectrosc. 2021 Mar 26;123:73–93. doi: 10.1016/j.pnmrs.2021.03.002
This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).