Lanes SF, Cohen A, Rothman KJ, Dreyer NA, Soden KJ. Mortality of cellulose fiber production workers. Scand J Work Environ Health. 1990 Aug 1;16(4):247-51.
The Multiple Sclerosis Study Group, Remavich M. Efficacy and toxicity of cyclosporine in chronic progressive multiple sclerosis: a randomized, double-blinded, placebo-controlled clinical trial. Ann Neurol. 1990 Jun;27(6):591-605. doi: 10.1002/ana.410270603
Allan JS, Kanda P, Kennedy RC, Cobb EK, Anthony MS, Eichberg JW. Isolation and characterization of simian immunodeficiency virus from two subspecies of African green monkeys. Aids Res Hum Retrovir. 1990 Mar;6(3):275-85.