@article{doi:10.1302/0301-620X.94B9.28750,
author = {Penning, L. I. F. and de Bie, R. A. and Walenkamp, G. H. I. M.},
title = {The effectiveness of injections of hyaluronic acid
or corticosteroid in patients with subacromial impingement},
journal = {The Journal of Bone & Joint Surgery British Volume},
volume = {94-B},
number = {9},
pages = {1246-1252},
year = {2012},
doi = {10.1302/0301-620X.94B9.28750},
url = {https://doi.org/10.1302/0301-620X.94B9.28750}
}