10 of those sites are in lots-of-sun states. Seems

10 of those sites are in lots-of-sun states. Seems like a good mix of climates. Some people have had good results with mild-to-moderate psoriasis with ultraviolet light treatments, so it's good that they are trying this both in places where people are exposed to sunlight most of the year, and also places where people are covered up lots of the year.