Yolken RH, Bishop (Johannes) CA, Townsend TR, Bolyard EA, Barlett J, Santos GW, Saral R. Infectious gastroenteritis in bone marrow transplant recipients. N Engl J Med. 1982 Apr 29;306(17):1010-2.
Jick H, Hannan MT, Stergachis A, Heidrich F, Perera DR, Rothman KJ. Vaginal spermicides and gonorrhea. JAMA. 1982 Jan 1;248(13):1619-21.