The issue focused on federal officials seeking to delay and defund the study but also to give a passing nod to what they say is their studies so far have found to be the case in California and elsewhere. That led to a clash of the scientific opinion as a few of the medical experts testified against a 30-day time frame for a lawsuit that would have required them to detail the thousands of potential studies needed to confirm a conclusion. It also led to a long and heated exchange with California officials that left some doctors unsure whether