And these technologies were very promising, but the problem was that they were either inefficient, or they were difficult enough to use that most scientists had not adopted them for use in their own laboratories, or certainly for many clinical applications.
Et ces technologies étaient très prometteuses, mais le problème était qu'elles étaient inefficaces, ou difficiles à utiliser, si bien que les scientifiques ne les ont pas adoptées dans leurs laboratoires ni pour des applications cliniques.