Ethics statement
Study participants provided signed informed consent to study
participation. The study was approved by the ethical review boards of
all participating institutions: McGill University, Montreal, Canada;
University of Toronto, Ontario, Canada; and the Ludwig Institute for
Cancer Research and the Hospital Maternidade Vila Nova Cachoeirinha,
both in São Paulo, Brazil. The study was performed in compliance with
relevant laws and institutional guidelines and in accordance with the
ethical standards of the Declaration of Helsinki.
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