From the scale of it and the size of the cast, you might think this is Avengers 3, by the way, but it isn't. Cap's guys are variously captured or go into hiding, while Thor and Hulk are busy ...

The total number of urine samples was 80, collected from 80 children. Forty-nine percent of these children were female. The mean ± SD age was 7.75 ± 1.3 years. Nineteen samples (23.8%) were collected ...