Από 17/7/00 έως 8/9/00: Medical Toxicology Unit,Guy’s and St Thomas’ Hospital Trust, London, UK.
Από 30/7/01 έως 1/10/01:Centre for Blood Research, Harvard School of Medicine, Boston, USA.
Από 1/7/04 έως 1/8/04:Armed Forces DNA Identification Laboratory, Armed Forces Institute of Pathology, Maryland, USA.
Από 1/6/10 έως 10/6/10:Biocentre, University of Leicester, UK.
Από 1/11/11 έως 15/11/11:Department of Forensic Molecular Biology, Erasmus MC, University Medical Centre Rotterdam, The Netherlands.