Contributors to this thread are from English-speaking countries, but the problem is of course a worldwide one. Here are the two cases I personally know from Belgium:
One of the two sons of a JW family died from leukemia, after having refused blood. His mother hung herself shortly thereafter.
When I became a JW at the age of 18, I soon experienced extreme attacks of panic. After a week of trying to endure it, I hung myself, and survived because the rope broke. It took years to recover, and I later became a pioneer. Fifteen years later, I realized the true nature of the WTS when I naively tried to draw the attention of the GB on the error of their blood policy. It ended up in a divorce.