31.   The drug is widely prescribed to those suffering from mood disorders.

32.   The most difficult months for people with SAD, a mood disorder linked to seasonal light variations, are January and February.

33.   There is a growing consensus that these steroids produced by the sex organs are responsible for the greater incidence of mood disorders and depression in women.

34.   Author of revealing and acclaimed books on mood disorders.

35.   So it made sense to study the gene that tells the body how to make the serotonin transporter, to see if some variant might promote mood disorders.