Author contributions
John Glaspy, Igor Bondarenko, Olga Burdaeva contributed to the conception and design of the study, investigation and data interpretation. Jianmin Chen and Dean Rutty contributed to data acquisition and data analysis respectively. Renshu Li prepared the draft manuscript. Shufang Wang, Qingsong Hou, Simon Li participated manuscript revision and approval. All authors reviewed and provided comments on the manuscript, and all authors read and approved the final manuscript.