Fissure in Ano

• GBUZ MO "Lvovskaia Raionaia Bolnica" — Podolsk, Moscow Oblast, Russia
• Astrakhan State Medical University — Astrakhan, Russia
• Medical Center ON-CLINIC — Moscow, Russia
• SSCCRussia — Moscow, Russia

• Skåne University Hospital — Malmö, Sweden

• Instituto Patrícia Lordelo — Salvador, Estado de Bahia, Brazil

• Al-Kindy Teaching Hospital — Baghdad, Iraq

• Leila Ghahramani — Shiraz, Fars, Iran

• St Claraspital — Basel, Switzerland

• University of Vermont Medical Center — Burlington, Vermont, United States
• University of Vermont Medical Center Fanny Allen Campus — Colchester, Vermont, United States

Not specified