FibroGen (NASDAQ:FGEN) stock is falling hard on Wednesday after the biopharmaceutical company reported results from failed clinical trials. The first failed clinical trial covers the treatment of metastatic pancreatic cancer with pamrevlumab. FibroGen said that this didn't meet its primary endpoint of overall survival. This was determined based on the protocol pre-specified Bayesian statistical analysis. The second failed study covered the use of pamrevlumab combined with gemcitabine + nab-paclitaxel to tre ...