Dr Kwekkeboom, Dr Krenning
  Dr Kwekkeboom, MD, did his thesis on pituitary adenomas in 1989 and from 1990 to 1994 worked as a research associate at the Department of Nuclear Medicine in Rotterdam, investigating the value of somatostatin receptor imaging in patients with neuroendocrine and other receptor expressing tumors. He registered as nuclear medicine physician in 1998 and from then on worked as a staff member at the Department of Nuclear Medicine at the University Hospital Rotterdam. His major research topic is peptide receptor imaging and he coordinates the studies on therapy with the radiolabelled somatin analogue 177Lu-octreotate in patients with neuroendocrine tumors. He has numerous publications in international journals and textbooks, mainly in the field of endocrinology and peptide receptor scintigraphy and therapy.

Dr Krenning completed his MD in 1972 and achieved a PhD by thesis at the University of Rotterdam in 1983. He has at present positions as Head of Department of Nuclear Medicine at the University Hospital, Rotterdam (since 1985), Professor of Nuclear Medicine (since 1990), and was made a Fellow of the Royal College of Physicians, London, UK, in 1999. Dr Krenning has participated in the educational responsibilities at the University Hospital Rotterdam, lecturing in Internal Medicine, Nuclear Medicine and Endocrinology throughout his career. Dr Krenning has been involved in research since 1975. His main interests include thyroidology and radioactive labelled peptides with their introduction into imaging and radionuclide therapy. Dr Krenning has been the (co)author of more than 250 peer-reviewed articles since 1975, more than 150 chapters and proceedings in the field of thyroidology and peptide receptor scintigraphy and therapy.