@misc{indiciae9be50fcf348a, title = {What's the difference.}, author = {L M Hoskins and L Thiel and B Walton-Moss and M A Schroeder and H M Clark}, year = {2001}, doi = {10.1097/00004045-200103000-00009}, url = {https://pubmed.ncbi.nlm.nih.gov/11985241/}, note = {Source identifier: 11985241} }