Skip to main content  Causes of suicide not always
straightforward  By Elizabeth Landau, CNN updated 11:29 AM EST,
Thu December 13, 2012   • It is unlikely for someone to take her
own life without previously considering suicide   • Mental
illness, substance abuse and family history of suicide are risk
factors   • Scientists are still looking into why people respond
differently to stress  (CNN) -- The reasons why people take
their own lives aren't always clear, mental health experts say;
a multitude of biological and psychological factors may be
involved in how individuals respond to difficult circumstances
in life.  The world may never know everything that contributed
to the apparent suicide of Jacintha Saldanha, a nurse who took a
prank call from Australian radio DJs pretending to be Queen
Elizabeth II and Prince Charles.  Saldanha's name became public
only after her death. She was found hanging from a wardrobe door
at her hospital living quarters, a coroner's court in London
heard Thursday. Saldanha left th