Systematic Reviews
Copyright ©The Author(s) 2015.
World J Gastroenterol. Apr 28, 2015; 21(16): 5056-5071
Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.5056
Figure 2
Figure 2 Number of peer reviewed publications since 1975. The number of publications peaked in 1991-2001 and continues to decline since that time.