PS: and if I was comparing with other countries I would still be very careful in my interpretation. For instance, they might be malnourished, there might not be the same health and safety regulations and they might be exposed to chemicals we are not, do they have more childbirths than we do? All of these can act as a trigger. There are just such a lot of variables. We also have good access to doctors, whereas in a lot of poor countries they don't so they might not be able to access the medicines that help or even know what exercises to do and that could make their cases more severe.