english: Well, there's a multitude of factors at play, but I think one of the key factors is that the tools that we currently have available to test whether a drug is going to work, whether it has efficacy, or whether it's going to be safe before we get it into human clinical trials, are failing us. They're not predicting what's going to happen in humans.
non_english: Pa, više faktora utiče, ali ja mislim da je jedan od ključnih taj da alati koji su trenutno raspoloživi da testiraju da li će lek imati efekta, da li je efikasan, ili da li će biti siguran pre nego što ga odnesemo na klinička ispitivanja na ljudima, nas dovode do neuspeha. Ne predviđaju šta će da se dogodi u ljudima.