Mahon BE, Ehrenstein V, Norgaard M, Pedersen L, Rothman KJ, Sorensen HT. Perinatal risk factors for hospitalization for pneumococcal disease in childhood: a population-based cohort study. Pediatrics. 2007 Apr 1;119(4):e804-12.
Yang J, Bogerd HP, Peng S, Wiegand H, Truant R, Cullen BR. An ancient family of human endogenous retroviruses encodes a functional homolog of the HIV-1 Rev protein. Proc Natl Acad Sci U S A. 1999 Nov 9;96(23):13404-8.