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.
Mean weekly intake time of the content of the different punch card cavities filled with clonazepam (a) and lorazepam (b) over 28 weeks. The daily amount of benzodiazepine taken is indicated with a bold grey line. The four different cavities per punch card are marked with a bold line (first cavity —); spotted line (2nd cavity …); dotted line (3rd cavity –); double line (4th cavity ==). Standard deviations are given as half bars (minus for first cavities; plus for the other cavities).
