1 School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, China; School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, New Orleans, LA 70112, USA. Electronic address: wsun3@tulane.edu.
2 Center for Science Communication and Health Education Management, National Research Institute for Family Planning, Beijing 100081, China.
3 School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, New Orleans, LA 70112, USA.