BPG is committed to discovery and dissemination of knowledge
Case Control Study
©The Author(s) 2015.
World J Gastroenterol. Aug 7, 2015; 21(29): 8868-8877
Published online Aug 7, 2015. doi: 10.3748/wjg.v21.i29.8868
Figure 1
Figure 1 Flow chart of study selection process.


Write to the Help Desk