Nevada Jury Instructions
CONCURRING CASES
There may be more than one [proximate] [legal] cause of an injury. When negligent conduct of two or more persons contributes concurrently as [proximate] [legal] causes of an injury, the conduct of each of said persons is a [proximate] [legal] cause of the injury regardless of the extent to which each contributes to the injury. A cause is concurrent if it was operative at the moment of injury and acted with another cause to produce the injury. [It is no defense that the negligent conduct of a person not joined as a party was also a [proximate] [legal] cause of the injury.]
NEV. J.I. 4.05
BAJI 3.77