Departments of Obstetrics and Gynecology and Anesthesiology, Perioperative and Pain Medicine, Brigham & Women's Hospital, Harvard Medical School, and the Department of Postgraduate Medical Education, Harvard Medical School, Boston, Massachusetts; and Hospital Central “Dr. Ignacio Morones Prieto,” San Luis Potosí, and Hospital General 450, Durango, Durango, Mexico.

Corresponding author: Michaela K. Farber, MD, MS, Brigham & Women's Hospital, Department of Anesthesiology, Perioperative and Pain Medicine, Harvard Medical School, Boston, MA, email: mfarber@bwh.harvard.edu.

Financial Disclosure The authors did not report any potential conflicts of interest.

Each author has confirmed compliance with the journal's requirements for authorship.

Peer reviews and author correspondence are available at http://links.lww.com/AOG/C67.

Received July 30, 2020

Received in revised form August 13, 2020

Accepted August 26, 2020