1 University of Massachusetts Medical School-Baystate, Baystate Health, United States of America. Electronic address: Peter.Friedmann@baystatehealth.org.
2 University of Georgia, United States of America.
3 University of Massachusetts-Amherst, United States of America.
4 Kaiser Permanente Washington Health Research Institute, United States of America.
5 University of Michigan, Center for Clinical Management Research, Ann Arbor VA Healthcare System, United States of America.
6 University of Cincinnati College of Medicine, United States of America.