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Columbia public health researchers have found that laws that punish drug use during pregnancy worsened family health outcomes or had no beneficial effect, contrary to the laws' intent.

Columbia psychologist Erin K. Engle discusses the signs that indicate the time is right to stop therapy and questions patients should ask themselves before moving on.

Columbia biomedical engineers are collaborating with orthopedic surgeons to build a living replacement knee to be tested in clinical trials within five years.