It often appears in papers discussing leukemia treatments or folic acid antagonists , citing earlier work from the early 20th century. 2. Compressed Data File
The term ".7z" is a standard file extension for the 7-Zip compression format . MED.7z
This is likely an OCR (Optical Character Recognition) error or a shorthand citation for a specific volume and page range of a medical journal from 1913. It often appears in papers discussing leukemia treatments