1. Department of Theoretical Chemistry and Biology, Royal Institute of Technology (KTH), AlbaNova University Center, Stockholm 10691, Sweden
2. Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Center for Alzheimer Research, Stockholm 17177, Sweden
3. Aging Theme, Karolinska University Hospital, Stockholm 14186, Sweden
4. College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China