Sentence:  And in both visual artists and creative writers, there is a considerably higher risk of affective disorder, more unipolar (depression only) in artists, and more <WSD>bipolar</WSD> (mania and depression) in writers, and leading to higher rates of alcoholism and suicide, particularly in writers (Andreasen 1987; DeLong & Aldershof, 1988; Jamison, 1986, 1995). 
Meaning of the word marked with <WSD> tags:  Relating to or having bipolar disorder.