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3. Screening of semen donors;Patel, R.; Kinghorn, G.R.; Barratt, C.L.R.;IntJ STD AIDS,1992
4. Sexually transmitted disease in potential semen donors;Monteiro, E.F.; Spencer, R.C.; Kinghorn, G.R.; Barratt, C.L.R.; Cooke, S.; Cooke, I.D.;BMJ,1987
5. Effective screening procedures for semen donors;Barratt, C.L.R.,1996