1. From the Department of Anesthesiology, Intensive Care, and Pain Management, Catharina Hospital, Eindhoven (Dr. van Suijlekom) and the Departments of Anesthesiology, Epidemiology, and Neurology, Pain Management and Research Centre (Ms. Lamé, Ms. Stomp‐van den Berg, and Dr. Kessels) and Neurology (Dr. Weber), University Hospital Maastricht; The Netherlands.