Patients in the necitumumab plus pemetrexed and cisplatin group had more grade 3-4 rash ( 45 [ 15 % ] of 304 vs one [ < 1 % ] of 312 patients in the pemetrexed and cisplatin alone group ) , hypomagnesaemia ( 23 [ 8 % ] vs seven [ 2 % ] patients ) , and grade 3 or higher venous thromboembolic events ( 23 [ 8 % ] vs 11 [ 4 % ] patients ) than did those in the pemetrexed and cisplatin alone group .