This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.
Also, on page 241, the last line of paragraph 2 in column 1 should read "about six months," rather than "about five months."
CORRECTION. Arch Gen Psychiatry. 1975;32(9):1150. doi:10.1001/archpsyc.1975.01760270082012
* * SCHEDULED MAINTENANCE * *
The JAMA Network Sites will be conducting routine maintenance from 10/20/2017 through 10/21/2017. During this window access to content and authentication may be intermittently available. The JAMA Store will be completely unavailable during the maintenance window.