You skipped right past the paragraph before that one describing the adult study that needs to succeed prior to the start of the child study.

Now, scientists will see just how similar, because humans are undergoing a similar trial. Lasting 11 months, this study focuses on 30 males between the ages of 30 and 64—each missing at least one tooth. The drug will be administered intravenously to prove its effectiveness and safety, and luckily, no side effects have been reported in previous animal studies.