Well, it turns out that those cells used in that laboratory, they're male cells, and the animals used in the animal studies were male animals, and the clinical trials have been performed almost exclusively on men.
Bueno, resulta que esas células utilizadas en ese laboratorio, son células masculinas, y los animales utilizados en los estudios con animales eran machos, y los ensayos clínicos se han realizado casi exclusivamente en hombres.