@article{Kottner2021,
author = {Kottner, Jan and Schmitt, J.},
year = {2021},
language = {eng},
copyright = {https://creativecommons.org/licenses/by-nc-nd/4.0/},
title = {Only the best instruments should be used to measure core outcomes},
volume = {185},
issn = {0007-0963},
pages = {3 - 4},
url = "http://dx.doi.org/10.17169/refubium-36904",
}