A population-based epidemiologic study of irritable bowel syndrome in South China: stratified randomized study by cluster sampling - Xiong, L. S.; Chen, M. H.; Chen, H. X.; Xu, A. G.; Wang, W. A.; Hu, P. J. (Blackwell Science Ltd, 2004)
http://dx.doi.org/10.1111/j.1365-2036.2004.01939.x
Keywords: WW-YZ