Journal Article
                        
                        Parish, William L, Edward O Laumann, Myron S Cohen, Suiming  Pan, Heyi  Zheng, Irving  Hoffman, Tianfu  Wang, and Kwai Hang  Ng.  
"Population-based study of chlamydial infection in China: a hidden epidemic." Jama 289, no. 10 (2003): 1265-1273.