1. Northern Institute for Cancer Research, Medical School, Newcastle University, Newcastle upon Tyne, UK
2. Present address: Science for Life Laboratory, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
3. Cancer Research Technology, Discovery Laboratories, Babraham Research Campus, Cambridge, UK
4. Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, UK
5. Northern Institute for Cancer Research, School of Chemistry, Newcastle University, Newcastle upon Tyne, UK