1. Department of Oncology and Pathology, Karolinska Institutet, Cancer Center Karolinska, R8:04, Karolinska University Hospital, SE-171 76 Stockholm, Sweden.
2. KTH Royal Institute of Technology, Computational Biology, Stockholm Bioinformatics Centre, SE-100 44 Stockholm, Sweden.
3. Department of Medical Sciences, Uppsala University, SE-751 85 Uppsala, Sweden.