1. West China Marshall Research Centre for Infectious Diseases Centre of Infectious Diseases West China Hospital of Sichuan University Chengdu 610041 China
2. Helicobacter pylori Research Laboratory School of Pathology & Laboratory Medicine Marshall Centre for Infectious Disease Research and Training The University of Western Australia M504, L Block, QEII Medical Centre, Nedlands WA 6009 Australia
3. School of Chemistry and Biochemistry The University of Western Australia, 35 Stirling Highway Crawley WA 6009 Australia
4. Ondek Pty Ltd., School of Pathology & Laboratory Medicine, Marshall Centre for Infectious Disease Research and Training, The University of Western Australia M504, L Block QEII Medical Centre, Nedlands, WA 6009 Australia
5. Swiss Vitamin Institute Route de la Corniche 1 CH‐1066 Epalinges Switzerland