1. Laboratory for Biological and Medical Mass Spectrometry, Uppsala University, Box 583 Biomedical Centre, SE-75123 Uppsala, Sweden, Department of Medicinal Chemistry, Division of Analytical Pharmaceutical Chemistry, Uppsala University, Box 574, Biomedical Centre, SE-75123 Uppsala, Sweden, Department of Physiology and Pharmacology, Karolinska Institute, SE-17177 Stockholm, Sweden, Department of Biochemistry and Mass Spectrometry Research Center, Vanderbilt University School of Medicine, 465 21 Avenue South,...