Given that tumors take several months to grow, biocompatible systems had to be developed that could release proteins and other large-molecular-weight substances slowly and continuously in the body – something that scientists were convinced was impossible.
Como los tumores tardan varios meses en crecer, hubo que crear sistemas biocompatibles que pudieran liberar lenta y continuamente proteínas y otras substancias de gran peso molecular en el cuerpo, cosa que los científicos consideraban imposible con la mayor convicción.