The cooperative group studies.

Autor: WILE UJ
Jazyk: angličtina
Zdroj: A.M.A. archives of dermatology [AMA Arch Derm] 1956 May; Vol. 73 (5), pp. 480-1.
DOI: 10.1001/archderm.1956.01550050058009
Databáze: MEDLINE