1. Nuclear Magnetic Resonance Facility, University of California at Davis, Davis, California 95616, United States
2. Waltham Petcare Science Institute, Mars Petcare, Freeby Lane, Waltham on the Wolds LE14 4RT, U.K.
3. Mars Advanced Research Institute, Mars Incorporated, 6885 Elm Street, McLean, Virginia 22101, United States