Oral Contraceptives and Multiple Sclerosis/Clinically Isolated Syndrome Susceptibility

• Kerstin Hellwig,

  Affiliations St. Josef University Hospital, Bochum, Neuroimmunological Ward and Outpatient Clinic, Bochum, Germany, Kaiser Permanente Southern California, Department of Research & Evaluation, Pasadena, California, United States of America

  ⨯
• Lie H. Chen,

  Affiliation Kaiser Permanente Southern California, Department of Research & Evaluation, Pasadena, California, United States of America

  ⨯
• Frank Z. Stancyzk,

  Affiliation University of Southern California, Keck School of Medicine, Los Angeles, California, United States of America

  ⨯
• Annette M. Langer-Gould

  * E-mail: Annette.M.Langer-Gould@kp.org

  Affiliations Kaiser Permanente Southern California, Department of Research & Evaluation, Pasadena, California, United States of America, Kaiser Permanente, Southern California Los Angeles Medical Center, Neurology Department, Los Angeles, California, United States of America

  ⨯