BibTex format
@article{Xu:2021:10.1007/s00415-020-10140-x,
author = {Xu, Z and Anderson, KN and Saffari, SE and Lawson, RA and Chaudhuri, KR and Brooks, D and Pavese, N},
doi = {10.1007/s00415-020-10140-x},
journal = {JOURNAL OF NEUROLOGY},
pages = {312--320},
title = {Progression of sleep disturbances in Parkinson's disease: a 5-year longitudinal study},
url = {http://dx.doi.org/10.1007/s00415-020-10140-x},
volume = {268},
year = {2021}
}