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.
U igri je više faktora, no mislim da je jedan od ključnih taj da nas alati koje trenutno imamo na raspolaganju za provjeravanje hoće li lijek raditi, biti učinkovit, ili pak biti siguran za uporabu prije nego što počnemo s kliničkim testiranjima na ljudima, oni nas izdaju. Ne predviđaju što će se dogoditi u ljudima.