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Several letters to the editor are presented in response to articles in previous issues including "As Apple Resists, Encryption Fray Erupts in Battle," in the February 18, 2016 issue, "Resetting the Post-Scalia Supreme Court," by Linda Greenhouse in the February 18, 2016 issue, and "Who Needs Math? Not Everybody," by Andrew Hacker in the February 7, 2016 issue.

Reports that biomedical companies are trying to convince parents that freezing blood cells drawn from the umbilical cord and placenta at birth, is a way to provide biological insurance for their children. Comparison between cord-cell transplants and bone marrow transplants; Comments from Dr. Eileen Gillan, a pediatric cancer specialist at the University of Connecticut Health Center. INSET: Umbilical cord-cell transplant..