@article {Schumacher207, author = {O. Peter Schumacher}, title = {A tribute to Penn G. Skillern, MD}, volume = {55}, number = {3}, pages = {207--207}, year = {1988}, publisher = {Cleveland Clinic Journal of Medicine}, issn = {0891-1150}, URL = {https://www.ccjm.org/content/55/3/207}, eprint = {https://www.ccjm.org/content/55/3/207.full.pdf}, journal = {Cleveland Clinic Journal of Medicine} }