Table 1. Top 10 institutions publishing original human studies on the topic of varicocele.

Ranking	Top 10 institutions	Number of publications
1	Cairo University, Egypt	75
2	Sapienza Università di Roma, Italy	36
3	Cleveland Clinic Foundation, USA	30
4	New York Presbyterian Hospital, USA	25
5	Royan Institute, Iran	22
6	University of Toronto, Canada	21
7	Università degli Studi di Verona, Italy	18
8	Mount Sinai Hospital of University of Toronto, Canada	17
9	Università degli Studi di Siena, Italy	16
	National Yang-Ming University, Taiwan
10	Tel Aviv University, Israel	15
	Weill Cornell Medicine, USA
	Universidade de São Paulo, Brazil
	Rabin Medical Center, Israel