Dr. Steven Shelov, left, has been appointed associate chief of staff at the Steven and Alexandra Cohen Children's Medical Center of New York in New Hyde Park (formerly known as Schneider Children's Hospital).

The Scarsdale resident was vice president of Maimonides Infants and Children's Hospital of Brooklyn.

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Chrystyne Olivieri has joined Sahay Medical Group as a nurse practitioner and certified diabetes educator practicing diabetes management at its Garden City location. Olivieri is a Greenlawn resident.

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