* Corresponding authors

^a Key Laboratory of Tropical Medicinal Resources of Ministry of Education, Collaborative Innovation Center of Tropical Biological Resources, Hainan Normal University, Hainan Haikou 571158, China
E-mail: c.zheng@yale.edu

^b Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Key Laboratory of South China Agricultural Plant Molecular Analysis, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
E-mail: tanhaibo@scbg.ac.cn

^c Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, USA

^d Department of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, USA