1. Two randomized controlled trials comparing the Tubal Ring and Filshie Clip for tubal sterilization 
David Sokal, M.D., Deborah Gates, Ramesh Amatya, Ph.D., Rosalie Dominik 
Fertility and Sterility 
Volume 74, Issue 3, Pages (September 2000)
DOI: /S (00)

2. Figure 1 Filshie Clip and applicator.
Sokal. Filshie Clip vs. Tubal Ring. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )

3. Figure 2 Participant flow chart for the minilaparatomy study.
Sokal. Filshie Clip vs. Tubal Ring. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )

4. Figure 3 Participant flow chart for the laparoscopy study.
Sokal. Filshie Clip vs. Tubal Ring. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )