Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
From "La Syphilis." Levaditi et Roché. Masson & Cie.
PDF (1.8 MB)
