@article {Williams744, author = {Jean Schils and Mitchell Kline}, editor = {Williams, Marc}, title = {Acute onset of knee pain}, volume = {68}, number = {9}, pages = {744--746}, year = {2001}, publisher = {Cleveland Clinic Journal of Medicine}, issn = {0891-1150}, URL = {https://www.ccjm.org/content/68/9/744}, eprint = {https://www.ccjm.org/content/68/9/744.full.pdf}, journal = {Cleveland Clinic Journal of Medicine} }