1. Section of Feed and Food Microbiology, National Veterinary Institute, Ullevaalsveien 68, P.O. Box 8156 Dep., 0033 Oslo, Norway
2. Ascomycete Research group Oslo (ARON), Division of Botany and Plant Physiology, Department of Biology, University of Oslo, P.O. Box 1045 Blindern, 0316 Oslo, Norway