Including events related to disease progression , adverse events with an outcome of death were reported for 66 ( 12 % ) of 538 patients in the necitumumab plus gemcitabine and cisplatin group and 57 ( 11 % ) of 541 patients in the gemcitabine and cisplatin group ; these were deemed to be related to study drugs in 15 ( 3 % ) and ten ( 2 % ) patients , respectively .