english: So by then, Robert had understood that very likely his patients were suffering from depression even after being cured of their cancer, because the cancer drug had stopped newborn neurons from being generated.
non_english: Bu esnada, Robert hastalarının kanser tedavisinden sonra bunalım yaşamalarının nedeninin kanser ilacının sinir hücrelerinin çoğalmasını engellemesi olduğunu anladı.