1. Yazd University and Oslo University, Yazd, Iran
2. Norw. Uni. of Science and Tech., Trondheim, Norway
3. Oslo University Hospital and University of Oslo, Oslo, Norway
4. University of Catania, Catania, Italy
5. Oslo University Hospitala and Norw. Uni. of Science and Tech., Oslo, Norway
6. Oslo University Hospital//Norw. Uni. of Science and Tech., Trondheim, Norway