Dear Testis Enthusiasts,

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Welcome you to the 20th European Testis Workshop (European Workshop on the Molecular and Cellular Endocrinology of the Testis), this time in Portugal!

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The first time we attended this very particular meeting, we said to ourselves that one day it would be our turn to organize it. The time is now, and we are both grateful and proud to be part of an outstanding community.

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Since the first edition in 1980 the ETW has established unique features/traditions that we will strive to maintain.

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To start we have chosen an intimate venue and pleasant hotel to provide all researchers an excellent environment to talk about science and socialize in a relaxed context. In fact, this meeting has, throughout the years, contributed to several successful collaborations and friendships worldwide...