@misc{indiciae1b69dad4406d, title = {Undifferentiated illness.}, author = {J Frith and S Knowlden}, year = {1992}, doi = {10.5694/j.1326-5377.1992.tb126474.x}, url = {https://pubmed.ncbi.nlm.nih.gov/1556975/}, note = {Source identifier: 1556975} }