1. Effects of oral and transdermal low-dose estrogen therapy on echocardiographic parameters of cardiac function 
Tatjana E Vogelvang, M.D., Marius J van der Mooren, Ph.D., Otto Kamp, Ph.D., Velja Mijatovic, Ph.D., Cees A Visser, Ph.D., Peter Kenemans, Ph.D. 
Fertility and Sterility 
Volume 80, Issue 3, Pages (September 2003)
DOI: /S (03)

2. FIGURE 1
Trial profile of the study. n = number of participants; tE2 = transdermal 17β-estradiol, 50 μg; oE2 = oral micronized 17β-estradiol, 1 mg; oE2+G = oE2 plus gestodene, 25 μg; numbers in parentheses represent numbers of participants included in the study for whom no echocardiography was performed.
Vogelvang. Estrogen therapy and echocardiography. Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )