Kriesel JD, Jones BB, Matsunami N, Patel MK, St Pierre CA, Kurt-Jones EA, Finberg RW, Leppert M, Hobbs MR. C21orf91 genotypes correlate with herpes simplex labialis (cold sore) frequency: description of a cold sore susceptibility gene. J Infect Dis. 2011 Dec 01; 204(11):1654-62.