Three different, non-mosaic sex chromosome abnormalities (direct cytotrophoblasts, mesenchymal core cultures, and abortus skin fibroblasts): implications for elucidating chorionic villi mosaicism. Issue 12 (December 1989) - Shulman, L P; Tharapel, A T; Simpson, J L; Meyers, C M; Tucker, B; Weisskopf, B; Elias, S