The most frequent grade @-@ events were cutaneous squamous-cell carcinoma ( @ -LSB- @ % -RSB- of @ patients ) and keratoacanthomas ( @ -LSB- @ % -RSB- ) , rash ( @ -LSB- @ % -RSB- ) , and abnormal liver function tests ( @ -LSB- @ % -RSB- ) in the vemurafenib group and neutropenia ( @ -LSB- @ % -RSB- of @ patients ) in the dacarbazine group .