1. Temporal trends in clomiphene citrate use: a population-based study
Sarka Lisonkova, M.D., Ph.D., K.S. Joseph, M.D., Ph.D. 
Fertility and Sterility 
Volume 97, Issue 3, Pages (March 2012)
DOI: /j.fertnstert
Copyright © 2012 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Period prevalence of clomiphene citrate treatment among women aged 20 to 49 years old in British Columbia, Canada, 1996–2008. ∗Denotes statistically significant decline. ‡Denotes statistically significant increase (P<.001, the Cochran-Armitage test for linear trend).
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2012 American Society for Reproductive Medicine Terms and Conditions