Ipilimumab administration for advanced melanoma in patients with pre-existing Hepatitis B or C infection: a multicenter, retrospective case series ================================================================================================================================================== * Sowmya Ravi * Kristen Spencer * Mary Ruisi * Nageatte Ibrahim * Jason J Luke * John A Thompson * Keisuke Shirai * David Lawson * Heddy Bartell * Ragini Kudchadkar * Ngoc Thi Gunter * Janice M Mehnert * Evan J Lipson