After watching the documentary, I read this book, which reads very easily. This is not a guide, but a demonstration of the virtues of the young, especially in addition to chemotherapy. He recalled that the first studies on the young date from the nineteenth century, with very positive results already. Since I tried, and I am convinced. This is a very good prevention. I love that this practice goes more in morals ... it is not very well received in general ... the road is still long, but it's a good start!