TY - GEN AU - Pranke,Patricia AU - Silveiro,João Carlos TI - Human rights cannot cover cells that were never in the womb SN - 1476-4687 PY - 2009///0318 KW - Beginning of Human Life KW - ethics KW - Bioethics KW - Brazil KW - Embryo Research KW - Humans N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1038/458147b ER -