1. Graduate Research Assistant Deptarment of Mechanical Engineering, Columbia University, New York, NY 10027 e-mail:
2. Assistant Clinical Professor Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, NY 10032 e-mail:
3. Graduate Research Assistant Department of Mechanical Engineering, Columbia University, New York, NY 10027 e-mail:
4. Vice Chairman for Research Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, NY 10032 e-mail:
5. Assistant Professor Department of Mechanical Engineering, Columbia University, New York, NY 10027 e-mail: