1. Department of Anesthesiology and Perioperative Medicine Mayo Clinic Rochester MN USA
2. Department of Biomedical Statistics and Informatics Mayo Clinic Rochester MN USA
3. Kaiser Permanente Northern California Division of Research Oakland CA USA
4. Department of Health Systems Science Kaiser Permanente Bernard J. Tyson School of Medicine Oakland CA USA
5. Department of Surgery University of Western Australia Perth Australia
6. Vitalant Research Institute San Francisco CA USA