imr90 cd4_primary_cells fetal_brain h1_mesendoderm cd34_primary_cells fetal_testes h1_trophoblast h1_mesenchymal fibroblasts_quad_left small_bowel_mucosa melanocyte vhmec fibroblasts_upper_back fibroblasts_abdomen fibroblasts_quad_right fetal_muscle fetal_muscle_back fetal_kidney h9_cells fetal_intestine_large fetal_stomach pancreas