Institution
- Johns Hopkins University. School of Medicine1
- Johnson & Johnson1
- Johnston Laboratories1
- Kansai Daigaku1
- Lawrence Berkeley National Laboratory1
- Lawrence Livermore National Laboratory1
- Louisiana Tech University1
- Loyola College in Maryland1
- Loyola University Chicago1
- MSU/NIH Mass Spectrometry Facility1
- Massachusetts General Hospital1
- Massachusetts Institute of Technology3
- McGill University1
- McMaster University2
- Michigan State University2
- Microtrace Analytical Services1
- Moskovskiĭ fiziko-tekhnicheskiĭ institut1
- NASA Space Sciences Laboratory1
- National Research Council Canada4
- Northwestern University (Evanston, Ill.)1