Stability of 17 endocrine analytes in serum or plasma after four cycles of repeated freezing and thawing​Elisabet Tjernvoll Arne Åsberg Ingrid Alsos Lian Lena Løfblad Gunhild Garmo Hov Ketil Thorstensen Gustav Mikkelsen a Department of Clinical Chemistry, Trondheim University Hospital, Trondheim, Norwayb Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norwayon April 17, 2025 at 12:34 pm