1. Direct gene analysis of chorionic vili: a possible technique for firsttrimester antenatal diagnosis of haemoglobinopathies;Williamson, R.; Eskdale, J.; Coleman, D.V.; Niazi, N.; Loeffler, F.E.; Modell, B.;Lancet,1981
2. Fetal sex prediction by sex chromatin of chorionic villi cells during early pregnancy. Chin MedJ3;of Obstetrics, Anshan Department; Gynecology,1975
3. Chorion biopsy in early pregnancy: a method for early prenatal diagnosis for inherited disorders;Kazy, Z.; Rozovsky, I.S.; Bakharev, V.A.;Prenatal Diagnosis,1982
4. Obstetric outcome and problems of mid-trimester fetal blood sampling for antenatal diagnosis;Ward, R.H.T.; Modell, B.; Fairweather, D.V.I.; Shirley, I.M.; Richards, B.A.; Hetherington, C.P.;Br J Obstet Gynaecol,1981
5. First-trimester fetal diagnosis for haemoglobinopathies: three cases;Old, J.M.; Ward, R.H.T.; Karagozlu, F.; Petrou, M.; Modell, B.;Lancet,1982