1. Guangdong Provincial Public Laboratory of Analysis and Testing TechnologyChina National Analytical CenterGuangdong Academy of Sciences 100 Xianlie Middle Avenue 510070 Guangzhou P. R. China
2. Department of PharmacyThe First Affiliated Hospital of Guangzhou Medical University 151 Yanjiang Road 510120 Guangzhou P. R. China
3. Division of Theoretical Chemistry and BiologySchool of BiotechnologyRoyal Institute of Technology (KTH)AlbaNova University Center Stockholm 100 44 Sweden
4. College of Biological ScienceUniversity of California One Shields Avenue CA95616 Davis USA