Google found it: Worldbank Hy2U

There exist at the Worldbank a database about hand washing for low-income countries. I was looking for that entry with Google, could not find it, but found this link:

Without any further description the word 'Hy2U' is printed, close to 'Tippy Tap, that features an extensive field study. In that study, the characteristics are names that matter for a successful introduction. Well worth reading, I should create a blog describing these characteristics in detail!

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