Simulator (IMAGE) Johns Hopkins Medicine Caption A. Low-fidelity simulated surgical model for ETV. B. High-fidelity model with hair, eyelashes and eyebrows. Credit Copyright AANS. Used with permission. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.