@inbook{1164345109, author={Richard P. Usatine and Mindy A. Smith and E.J. Mayeaux, Jr. and Heidi S. Chumley}, title={The Essence of Family Medicine: Introduction}, booktitle={The Color Atlas and Synopsis of Family Medicine, 3e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2019}, url={dermatology.mhmedical.com/content.aspx?aid=1164345109} }