Fig 1.
Flow chart of participation in the clinical examination. ATCs = Addiction Treatment Centers; PB = Pelarbacken; PDHS = Public Dental Health Service; CNSS = central nervous system stimulants (amphetamine, cocaine and khat).
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.