British Journal of Psychiatry, UK - 12 minutes ago... from out-patient clinics in secondary and tertiary care in the north-east of England; 54 had bipolar type I disorder, 9 had type II and 5 were rapid-cycling. ...
http://bjp.rcpsych.org/cgi/content/full/186/1/32
http://bjp.rcpsych.org/cgi/content/full/186/1/32