The studies mentioned in this article had no control arm - neither was double-blind, and only one was randomized. https://en.wikipedia.org/wiki/Young_blood_tran

The studies mentioned in this article had no control arm - neither was double-blind, and only one was randomized. https://en.wikipedia.org/wiki/Young_blood_transfusion#Ambrosia https://en.wikipedia.org/wiki/Young_blood_transfusion#Ambros...