Anti-sperm Antibody Positivity in Men with Varicocele: A Systematic Review and Meta-Analysis by Marco Falcone, Kadir Bocu, Hakan Keskin, Jesus Fernando Solorzano Vazquez, Ravi Banthia, Tara Mahendran, Muslim Dogan Deger, Vinod Kv, Preto Mirko, Ahmed M. Harraz, Ramadan Saleh, Rupin Shah, Ashok Agarwal