I can talk about the costs to patients and their family members. Sometimes you can't measure the economic and emotional burdens just by numbers. For example, many patients' spouses told us it drained them every day to take care of their husband or their wife.
In addition, I think what you look at is the cost to the entire family in extra worry. Children are constantly worrying about their parents and disrupting their work and their lives. The quality of life declines. And then there are the falls. Actually, these are the biggest costs to society. I think the cost of falls by itself is around $3 billion a year, taking into account the cost of fractures and hospitalizations.